AU2010201102B2 - Light Assembly for Domestic and Industrial Enviroments - Google Patents

Abstract

10 A light assembly for use in domestic and industrial environments, the assembly comprising: a housing including an outer surface and an inner surface both terminating at an open first end of the housing and at an opposite closed second end; 1 5 the housing defining an internal space which receives and retains at or near the second end, a mounting surface which receives and retains at least one light emitting diode (LED) mounted in the internal space; the housing further comprising on the inner surface a light reflective surface which receives and reflects light emitting from said LED's and which is arranged to reflect at least 20 the majority of all available light emitted from said at least one LED; wherein the light reflective surface is arranged so that the angle between the reflective surface and light rays emitted from the LED's, optimizes reflection of that light so that most or all light of available light for a given power rating emitted from the at least one LED is reflected. TF-r (3 N N Nn

Description

5 LIGHT ASSEMBLY FOR DOMESTIC AND INDUSTRIAL ENVIRONMENTS 10 COMMONWEALTH OF AUSTRALIA 15 PATENTS ACT 1990 20 The invention is described in the following statement: 25 30 35 5 LIGHT ASSEMBLY FOR DOMESTIC AND INDUSTRIAL ENVIRONMENTS 10 BACKGROUND The present invention relates to appliances and apparatuses and more particularly relates to lighting apparatuses for use in domestic, commercial and industrial environments. The invention further relates to a lighting apparatus 15 which provides illumination from a light source at a particular lumen and maximizes reflected light for a given power rating and which provides increased light reflection for a given power rating compared to light level emission from a known apparatus of a similar power rating. The invention further provides an assembly which distributes increased illumination without a corresponding 20 increase in power. rating. The present invention also relates to a method of illumination of spaces using a lighting assembly which includes an LED and diftser or reflector and which and which reduces or eliminates unwanted reflected light. 25 The invention further relates to an alternative lighting system and assembly for industrial and domestic lighting which is environmentally friendly, increases illumination without increasing energy consumption. PRIOR ART 30 There are in existence a wide variety of lighting apparatuses used in a wide variety of applications. It is known in the art for lighting to be provided by various light bulbs including the well known incandescent light bulb, the halogen bulb and the light emitting diode ( known as LED's) and metal halide lamp. An incandescent light bulb is made up of a thin, glass envelope. Inside 35 the glass-is a gas such as argon and/or nitrogen. At the center of the lamp is a 2 tungsten filament. Electricity heats this Filament up to about 4,500 degrees F (2,500 degrees Celsius). The tungsten gets white hot at that temperature and 5 emits visible light in a process called incandescence. A normal light bulb is not power efficient and it only lasts about 750 to 1,000 hours in normal use. It's not particularly efficient because, in the process of radiating light, it also radiates a huge amount of infrared heat and in fact far more heat than light. Since the purpose of a light bulb is to generate light, the 10 heat is wasted energy. Incandescent lights do not last very long because the tungsten in the filament evaporates and deposits on the glass. Eventually, a thin spot in the filament causes the Filament to break, and the bulb burns out. A halogen lamp also uses a tungsten filament, but it is encased inside a much smaller quartz envelope. Because the envelope is so close to the filament, it 15 would melt if it were made from glass. The gas inside the envelope is also different since it consists of a halogen gas. Halogen gas combines with tungsten vapor. If the temperature is high enough, the halogen gas will combine with tungsten atoms as they evaporate and redeposit them on the filament. This recycling process lets the filament last a lot longer. Halogen lights have a 20 typical life of 1500 - 4000 hours. It is possible to run the filament hotter, so as to get more light per unit of energy. Because the quartz envelope is so close to the filament, it is extremely hot compared to a normal light bulb. Another form of known lighting is provided using light emitting diodes. Light emitting diodes (LED's) are used in a variety of applications. LED's do dozens 25 of different jobs and are found in all kinds of devices, Among other things, they form the numbers on digital clocks, transmit information from remote controls, light up watches and act as appliance indicating lights, When collected together, they can form images on a jumbo television screen or illuminate a traffic light. LEDs are tiny light bulbs that fit easily into an 30 electrical circuit. But unlike ordinary incandescent bulbs, they don't have a filament that will burn out and they do not become relatively hot. They are 3 illuminated solely by the movement of electrons in a semiconductor material, and they last just as long as a standard transistor, and typically have a life of about 40000-100,000. Light is a form of energy that can be released by an atom. It is made Lp of many small particle-like packets that have energy and 5 momentum but no mass. These particles, called photons, are the most basic units of light. Photons are released as a result of moving electrons. Electrons in different orbitals have different amounts of energy. For an electron to jump from a lower orbital to a higher orbital, something has to boost its energy level. Conversely, an electron releases energy when it drops 10 from a higher orbital to a lower one. This energy is released in the Form of a photon. A greater energy drop releases a higher-energy photon, which is characterized by a higher frequency. LED's have always been considered decorative light source until recently. Technological advances have now allowed them to be used as a general light 15 source, however, not all LED's are the same. In fact, there is even more to consider than just the LED itself. The optics power supply and thermal management design are other important elements. By way of practical example, a form of LED lights is disclosed in US Patent No 68577561 which teaches a hand held work light. There are a plurality of 20 focused LED's mounted on a mounting member and electrically connected to the battery. A circuit with a current limiting device energizes the LED's from the battery. There are a plurality of electrical contacts for respectively contacting the battery contacts and connecting the battery to the energizing circuit. One of the battery contacts is connected to the electrical contact within 25 the enclosure and the electrical contact is prevented from contacting another of the battery contacts. The prior art also teaches metal halides lights which were developed in the early nineties. LED's traditionally use small wattage to achieve the same light intensity as a comparable incandescent bulb. 30 Halogen lights usually comprise a housing which supports a halogen lamp. The housing has an inner surface which allows reRection of light to the location at 4 which the light is required. However, conventional halogen light fittings suffer from light losses due to back reflection away from the location light is required and light reabsorbed back into the quartz capsule.. Unwanted reflection is also lost through gaps which are usually present in halogen light fittings and result 5 from the geometry of the light and the nature of the engagement with the reflector. Light housings are usually parabolic as that shape usually provides optimal reflection of available lights. Lights of a particular wattage produce a certain amount of light which is the maximum light available for that wattage. Each light has an output ratio which is a ratio between light available ( lumens) 10 and light reflected to the space to be illuminated. This is the light output ratio (LOR). Light output is measured in Lumens and light delivered to a lit space is measured in Lux. Lights have a 100% peak intensity but do not usually deliver at that intensity. The relationship between lamp and reflector determines what light is made available to the space. A beam emitted From a lamp has a beam 15 angle. Typically, a beam angle will be in the region of 36 degrees. Some light is delivered down from the lamp directly and some is reflected to the lit space via reflectors. However, back reflection causes around 30% loss of available light. Lamps can reabsorb some of the light they deliver resulting in an LOR of 40%- 50% only. 20 There is an ongoing need to provide improvements in lighting efficiency to conserve power. There is also a need to provide lighting assemblies in which the reflected light losses are kept to a minimnunm and the LOR is increased for a given light power ( wattage). There is also a need to provide low cost, robust, 25 longer life and minimal maintenance illumination of work and domestic environments with improved power efficiency. INVFNTJON 30 The present invention provides a lighting apparatus for use in domestic or industrial environments which provides increased illumination at a particular 5 lumen without an increase in power consumption compared to known lights providing a same degree of illumination. The present invention also provides a method of illumination of spaces using a lighting assembly which includes an LED and diffuser or reflector and which reduces or eliminates unwanted 5 reflected light. The invention further provides an alternative lighting system and assembly For industrial and domestic LED lighting and which increases lighting distribution and intensity and without a corresponding increase in power consumption. The 10 invention further provides a low glare LED lighting fitting which has increased light intensity for the same wattage/power of an alternative conventional light. This makes light fittings according to the invention more efficient as they capture and distribute almost all available light from the light source thereby providing maximum light intensity for a given power. 15 In one broad form the present invention comprises: a light assembly for use in domestic and industrial environments, the assembly comprising: a. parabolic housing including an outer generally convex surface and an inner 20 generally concave surface defining an internal space, at least one light emitting diode (LED) mounted in the internal space, the housing further comprising a light reflective surface which is arranged to reflect all available light emitted from said at least one LED; wherein the light reflective surface is arranged so that the angle between the reflective surface 25 and light emitted optimizes reflection of that light so that more light of available light emitted from the at least one LED is reflected for a given power rating. Preferably, using the assembly above more light is delivered compared to a prior art light of the same wattage. 30 In another broad form the present invention comprises: 6 a light assembly for use in domestic and industrial environments, the assembly comprising: a housing including an outer surface and an inner surface both terminating at an open first end of the housing and at an opposite closed second end; 5 the housing defining an internal space which receives and retains at or near the second end, a mounting surface which receives and retains at least one light emitting diode (LED) mounted in the internal space; the housing further comprising on the inner surface a light reflective surface which receives and reflects light emitting from said LED's and which is arranged to reflect at least 10 the majority of all available light emitted from said at least one LED; wherein the light reflective surface is arranged so that the angle between the reflective surface and light rays emitted from the LED's, optimizes reflection of that light so that most or all light of available light for a given power rating emitted from the at least one LED is reflected. 15 It is one object of the invention to meet the requirements for providing high levels of illumination using LED's while conserving power consumption. It is a Further object of the invention to provide a. lighting assembly which uses 20 efficient heat dispersion and light reflection techniques to minimise lighting losses and minimize power consumption. . It is a further object of the invention to provide a lighting assembly which uses conductive materials and low levels of electrical power and energy storage to 25 meet classification requirements for various industrial environments. It is a further objection of the invention to provide a lighting assembly which meets classification requirements for industrial and domestic areas. It is a further object of the invention to provide a lighting assembly which has higher light output for a given wattage, the relatively low heat benefits of an 30 LE.. D and operational efficiency. 7 The present invention provides an alternative to the known prior art and the shortcomings identified. The foregoing and other objects and advantages will appear from the description to follow. In the description reference is made to the accompanying representations, which forms a part hereof, and in which is 5 shown by way of illustration specific embodiments in which the invention may be practiced. These embodiments will be described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that structural changes may be made without departing from the scope of the invention. In the accompanying 10 illustrations, like reference characters designate the same or similar parts throughout the several views. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is best defined by the appended claims. 15 BRIEF DESCRIPTION OF DRAWINGS Figure I shows a schematic view of a prior art halogen light assembly with light distribution regime and housing open at the light source end. 20 Figure 2 shows a perspective view of a light assembly 1 constructed in accordance with the present invention. Figure 3. shows a schematic view of a light assembly according to the present invention showing light distribution regime. 25 Figure 4. shows a cross sectional elevation view of a parabolic light fitting housing according to one embodiment; Figure 5. shows a horizontal cross section of the housing of figure 4 taken at 30 line C-C; 8 Figure 6 shows a plan view of the housing of figure 4 looking into the light Fitting; Figure 7 shows an abbreviated perspective view of a parabolic housing 5 according to one embodiment; and Figure 8 shows an outer view of the light fitting of figure 4. Figure 9 shows an exploded view of a light assembly according to one 10 embodiment. DETAILED DESCRIPTION 15 The examples referred to herein are illustrative and are not to be regarded as limiting the scope of the invention. While various embodiments of the invention have been described herein, it will be appreciated that these are capable of. modification, and therefore the disclosures herein are not to be construed as limiting of the precise details set forth, but to avail such changes and alterations 20 as fall within the purview of the description . Shopping centres, supermarkets and the like have substantial lighting requirements. Lux levels are used to set a level of lighting in particular environments and indirectly to create an atmosphere. A supermarket will for 25 instance have a high level lux requirement to enable consumers to see products properly. Other commercial establishments might select lighting to create mood in which case the lighting selected can determine lux level for a particular environment. Subdued lighting may for instance be used in an establishment to create a particular mood. This might typically occur in a high end store. In 30 supermarkets and similar establishments mood is less important then the ability of the consumer to read and identify products. In industry, certain maximum or 9 minimum lux levels may be a mandatory requirement. This may be dictated by safety concerns in a particular establishment. For instance, passageways in public thoroughfares will require a minimum lighting requirement. In a given establishment there may be multiple mandatory lux levels. There can be as 5 many as 25 zone lux levels in a particular establishment. Traditional lighting assemblies have very high maintenance costs. An incandescent light For instance uses 80 watts and emits a particular lux. An assembly built in accordance with the invention using an LED and reflector, increases light for the same power consumption. The assembly is configured and intended to capture all light. 10 Capture of all available light is elimination of unwanted reflection, wastage or loss of light. The assembly of the present invention has a geometry which includes facets on a reflector arranged so as to disburse light emitted from an LED. 15 According to the invention a light assembly is provided which is capable of providing an LOR which enables 100% of available light to be captured and directed to the space to be lit. This is enabled by a reflector which has a low glare angle. Traditionally plastics lenses ( PMMA acrylic are the most common) have high glare from the surface of the lamp. Glare also causes high 20 glare due to internal reflection. Glare is an unwanted by product of intense light emanating from a light source, The light assembly according to a preferred but non limiting embodiment, uses the Format of four LED's in one housing. The invention will now be described with reference to representations. 25 Figure 1 shows a schematic view of a prior art halogen light assembly I with light distribution regime. Assembly I includes a light body 2 having an outer surface 3 and inner surface 4. Body 2 is preferably parabolic and is arranged to provide optimal light reflection From a halogen light source. Included in the 30 light body 2 is a halogen light 5 The arrangement of fitting of the halogen lamp 5 to the light body 2 usually leaves a gap 6 between the light body 2 and lamp 5. 10 This causes unwanted reflected light losses preventing capture of 100% of available light emitted from the halogen lamp 5. The light body 2 is manufactured from a metal, such as but not limited to aluminiurm or aluminium coated on a glass body and provides a reflective surface. As shown 5 schematically with reference to arrows 7, light emitted from halogen lamp 5 is partially reflected to the direction light is required but also shown by lines 8 partially reflected away from the region light is required through gap 6. In the region of the halogen lamp 5 light intensity is at its greatest but all available light wilH not be delivered to the space selected for illumination due to reflection 10 losses. Figure 2 shows a perspective view of a light assembly 10 constructed in accordance with the present invention. The assembly 10 is arranged to capture 100% of available light and comprises a light body 11 including a light housing 15 12 which defines an internal space 13. Located in internal space 13 is an LED 14. An LED (particularly a white LED) may have an emission area including indium gallium nitride semi conductor to achieve efficiency and a higher wattage. Housing 12 has an outer surface 15 and inner generally parabolic reflective surface 16. Reflective surface 16 includes tapered facets. A variety of 20 alternate facet configurations may be used The geometry of the facets on the reflector surface 16 produce a homogenous beam. Figure 3 shows a schematic view of a light assembly 20 according to the present invention showing light distribution regime. Assembly 20 includes a light body 25 21 having an outer surface 22 and inner surface 23. Body 21 is preferably parabolic and is arranged to enhance optimal light reflection from a light source. Included in the light body 21 is at least one LED 24 which locates on a generally flat surface and seals the light body 21. The arrangement of fitting of the LED 24 to the light body 21 eliminates unwanted reflection enabling capture 30 of 100% of available light emitted from the LED. Preferably the light body 21 is manufactured from a metal such as but not limited to aluminium and provides a reflectiv' surface. As shown schematically with reference to arrows 25, light emitted from LED 24 is fully reflected with no losses through any gaps in the region of the LED. Light intensity is inversely proportional to the distance from , the light squared. In the region of the LED, light intensity which is measured 5 in Lumen is at its greatest but all available light will be delivered to the space selected for illumination with surface lux only affected by the inverse proportion phenomenon rather than by reflection losses at the light source. The light assembly described operates between a wide environmental ambient 10 temperature range and is robust and durable. The light body 21 is resilient able to resist impact damage during storage, transit or use. Figure 4. shows a cross sectional elevation view of a parabolic light fitting 30 according to one embodiment, Fitting 30 comprises a housing 31 including an 15 outer surface 32 and an inner surface 33 both terminating at an open first ( equatorial) end 34 of the housing and at an opposite closed second ( polar) end 35. The shape oF the housing 30 is preferably selected according to the shape of the area to be illuminated. The housing defines an internal space 36 which receives and retains at or near 20 the second end 35, a mounting surface 37 which receives and retains at least one light emitting diode (LED) 38. The housing further comprises on the inner surface 33 a light reflective surface 39 which receives and reflects light emitting from LED 38 and which is arranged to reflect at least the majority of all available light emitted From the LED 38. The light reflective surface is 25 arranged so that the angle between the reflective surface and light rays emitted from the LED's, optimizes reflection of that light so that most or all light of available light For a given power rating emitted from the at least one LED is reflected as shown also in figure 2. Figure 4 shows an array of symmetrical light beams 40, 41 and 42 which are fully reflected by reflecting surface 39. In the 30 example shown, beam 40 leaves LED 38 at a shallow angle and this increases with bean 41 and further increases with beam 42. Light reflective surface 39 has 12 a geometry which captures and reflects all light from the LED 38 and reflects it to an illumination zone in the direction of beams 40, 41 and 42. Specifically the light reflective surface 39 includes a plurality of facets 43 distributed in segments over and forming the inner surface 39 and oriented to capture and 5 reflect light emitted from the LED 38. The Facets 43 are oriented relative to the direction of light emitting from LED 38 to enable formation of a low glare angle. Figure 5. shows with corresponding numbering a horizontal cross section of the housing of figure 4 taken at line C-C. Figure 6. shows a plan view of the 10 housing of figure 4 looking into the light Fitting; Figure 7. shows with corresponding numbering an abbreviated inverted perspective view of parabolic housing 30. As shown in figure 7 the reflective inner surface 39 splays out from the light source 38 with the bea-m angle 15 increasing from the light source to the facets as the beams 40 41 and 42 travel distally. The inner reflective surface 39 is divided by spaced lines of longitude and lines of latitude and each segment thus formed comprises one reflective facet 50. Each facet segment is defined by two of a plurality of longitudinal spaced apart meridians 44, 45 and two of a plurality of spaced apart lines of 20 latitude 46 and 47. According to the embodiment shown and as may be seen rom the cutaway profile, each facet has a convex outer surface which is curved in both an X and Y direction as shown. A facet array 51 of facets between spaced apart lines of longitude 52 and 44 increase in width as the facets extend along the reflective surface 39 towards the equatorial region 34. Array of facets 25 51 are also located at increasing radial distances 54 from a central axis 53 to the reflective surface 39 as the facets extend along the reflective surface towards the equator region 34. The sets of facets between spaced apart lines of longitude each have convex curvature which increases in radii as the facets extend along the reflective surface towards the equator. The facets arrays are repeated about 30 the full periphery of the housing 30. Each facet according to one embodiment 13 has at least a first curved portion which receives light from a light source and at least a second curved portion which reflects light received at the first portion. The parabolic housing is according to one embodiment manufactured from a metallic and/ or plastics material. 5 figure 8 shows an exploded view of a light assembly 60 according to one embodiment. In the assembly shown a gang of four LED specular faceted reflector light fittings 61, 62, 63 and 64 which respectively receive and retain mounting plates 65, 66, 67 and 68 which retain LED's 69, 70, 71 and 72. The 10 gang assembly is mounted on mounting plate 74. Assembly 60 also includes a heat sink 73. The light assemblies according to the invention ha.s numerous advantages. 15 Firstly the use of diodes provide high levels of illumination while minimising emitted (waste) heat. The use of efficient heat dispersion techniques minimises surface temperatures. Another advantage is the use of low levels of electrical power and energy storage which also meets classification requirements for industrial areas equipment. Materials which may be selected for the light 20 housing preferably include conductive materials such as metals or other suitable materials. Where a light fitting for distributing light has internal smooth surfaces which receive light rays, this does not work well with LED's. For optimal light 25 distribution light rays need scattering to ensure a smooth light beam. According to the prior art light fittings, light was scattered in all directions and the geometry of the light fitting prevented light from being directed in a way which optimises light intensity for a given wattage. 30 According to the light fittings of the invention described herein, facets are provided which are optically arranged and aligned to spread and direct light rays 14 together so beam direction is effectively controlled. An LED point source is typically broader than incandescent lights, In lighting generally it is hard to achieve a smooth light distribution and beam of an optimum intensity so the use of the facets according to the invention achieve a light distribution which is 5 up to 95% efficient. Typically light fittings according to the invention would be used in such applications as display lighting, in store general lighting applications, confined area cabinet lighting, jewellery store cabinet lighting and particularly in applications where heat which would be generated by other forms of lighting would not be acceptable. Since there is no heat of significance in an 10 LED light this contributes to a reduction in air conditioning costs. This absence of heat also prevents premature aging of fruit and vegetables fresh sea foods and perishable Foodstuffs. The light assembly according to the invention also reduces maintenance costs as bulbs do hot have to be regularly changed avoiding the attendant costs in this process. The light according to the invention 15 also have consistent lighting parameters from fitting to fitting so light ratings are constant and reliable thereby ensuring compliance with standards. The lights enable energy savings without compromise to output and light quality. Typically the lights will have a lire of 50,000 hours up to 100,000 hours and low lumen depreciation. 20 The geometry of the light fittings in each of its potential embodiments is governed by aesthetic but principally performance considerations. Matters of symmetry although potentially contributing to performance are primarily functional in that symmetry can contribute to the reflection of light from the 25 light source. In a light fitting according to the invention, an LED provides the light source. There can be one or more LED's providing the light source in a typical light fitting according to the invention. Light emitted from the LED's varies in intensity relative to the light source. The intensity of light captured by the reflecting facets varies according to the location of the Facets relative to the 30 light source as the angle of incidence of the light changes depending upon those locations. At the location of the light source, the angle of the light emitted by 15 the LED's and received by the facets adjacent or near to the light source is shallow. The intensity of that light is relatively low compared to light rays which extend from the source at a higher angle. Reflector facets having the same diameter, same depth, same curvature have slightly different beam angle. 5 Each facet preferably has a curvature in an X and Y direction but it will be appreciated that facets with a straight or other shaped faces can be used. According to one embodiment, each facet is preferably rectangular with the X and Y radiused curve. The location and geometry of each facet contributes to the capture and reflection of all light without wastage. If a facet is flat and 10 generally square when hit by light each facet is pointing towards the front. There is-less internal repeating of reflection in this instance. Also contributing to the integrity of the light reflection is what is known as the purity of the reflecting surface. Many known reflecting surfaces have a gritty or sand blasted finish which compromises total reflection. The reflective surface should 15 optimally be a mirror finish or a pure surface. Preferably a plastics fitting with a coating of polished aluminium provides purity oF reflection. Typical known halogen lights are not pure as the surface is roughened. Reflective surfaces which are roughened, cause internal reflection which reduces light intensity where in the filed to be ulluminated. The ideal surface for optimal reflection is 20 mirrored. Where metallic fittings are used it is necessary also to use glass not aluminium as metals can be very hot particularly in a hot halogen environment. Peak Intensity 25 In a light fitting, intensity varies in output intensity from the LED source. This is also affected by the angle of light beams. A light has a peak intensity zone, which will usually occur at a location where light rays impact of a reflector at the shallowest angle. Most light is reflected in that zone. From the light source to midway up the reflector light intensity is low but this increases up to the most 30 distant reflectors on the fitting. It is important that light is able to access all facets provided for reflection but the intensity will vary as facet position varies 16 relative to the light source. At approximately 88 degrees, the light from the L ED is up to peak intensity. It will be recognised by persons skilled in the art that numerous variations and 5 modifications may be made to the invention broadly described herein without departing from the overall spirit and scope of the invention. 10 I5 20 25 30 17

Claims (31)

1. A light assembly for use in domestic and industrial environments, the assembly comprising: a housing including an outer surface and an. inner surface both terminating at an open first end of the housing defining an equator and at an opposite closed second end defining a pole; the parabolic housing defining an internal space which receives and retains at or near the second end, a mounting surface which receives and. retains at least one light emitting diode (LED) mounted in the internal space; the housing further comprising on the inner surface a light reflective surface which receives and reflects light emitting from said LED's and which is arranged to reflect at least the majority of all available light emitted from said at least one LED; a set of facets arranged between the equator and pole and oriented relative to the direction of light emitting from an LED to enable formation of a low glare angle; the facets are located between spaced apart lines of longitude increasing ini width as the facets extend along the reflective surface towards the equator; the at least one LED's located on a flat platform at the pole which closes the housing at the pole to prevent avoid back light escape from the housing; wherein the light reflective surface is arranged so that the angle between the reflective surface and light rays emitted from, the LED's, optimizes reflection of that light so that most or all light of available light for a given power rating emitted from the at least one LED is reflected.

2. A light assembly according to claim 1 wherein light reflective surface has a geometry which captures and reflects all light from the at least one LED and reflects it to an illumination zone.

3. A. light assembly according to claim 2 wherein the light reflective surface includes a plurality of facets oriented to capture and reflect light emitted from the at least one LED. 18

4. A light assembly according to claim 3 wherein there are facets at the second end located near the light source and facets at the first end located at a maximum distance from the light source.

5 A light assembly according to claim 4 wherein the shape of the housing is selected according to the sbape of the area to be illuminated.

6 A light assembly according to claim 5 wherein, the inner reflective surface is segmented by the facets.

7. A light assembly according to claim 6 wherein the reflective inner surface splays out from the light source thereby increasing the beam angle from the light source to the facets as the beam travels distally.

8. A light assembly according to claim 7 wherein, the housing is parabolic.

9. A light assembly according to claim 8 wherein, the inner reflective surface is parabolic

10 A light assembly according to claim 9 wherein the inner reflective surface is divided by spaced lines of longitude and latitude. Hi.

A light assembly according to claim 10 wherein, each segment comprises one facet.

12. A light assembly according to claim II wherein, each facet segment is defined by two longitudinal spaced apart meridians and two spaced apart lines of latitude

13. A light assembly according to claim 12 wherein, each facet has a convex outer surface. 19

14. A light assembly according to claim 13 wherein a set of facets between spaced apart lines of longitude are located at increasing radial distances from a central axis of the housing as the facets extend along the reflective surface towards the equator.

15. A light assembly according to claim. 14 wherein, the set of faccts between spaced apart lines of longitude each have convex curvature which increases in radii as the facets extend along the reflective surface towards the equator.

16. A light assembly according to claim 15 wherein cach set of facets between spaced apart lines of longitude each have the same geometry so that the facets arrays are repeated about the full periphery of the housing.

17. A light assembly according to claim 16 wherein each facet has a first curved portion which receives light from a light source and at least a second curved portion which reflects light received at the first portion.

18. A light assembly according to claim 17 wherein a set of facets between spaced apart lines of longitude are located at increasing radial distances from a central axis of the housing as the facets extend along the reflective surface towards the equator.

19. A light assembly according to claim 18 wherein there are four LED's in one housing.

20. A light assembly according to claim 19 wherein, the parabolic housing is manufactured from a metallic and/ or plastics material.

21. A light assembly according to claim 20 wherein, there are four LED's located on a flat surface of the housing. 20

22. A light assembly according to claim 21 wherein, the light housing i manufactured from aluminium coated on a glass body and provides a reflcctivc surface.

23. A light assembly according to claim 8 wherein the housing is either square or rectangular.

24. A light assembly according to claim 23 wherein, each segment cumpri:t one facet.

25. A light assembly according to claim 24 wherein a set of facets increases in size as the facets are located distally of the light source to a rim of the houing.

26. A light assembly according to claim 18 wherein, the set of faceLs between spaced apart lines of longitude each have convex curvature which increa: in radii as the facets extend along the reflective surface towards the equator.

27 A light assembly according to claim 26[30] wherein each set of facts forming the inner reflective surface has the same geometry which is repeated about the full periphery of the housing.

28. A light assembly according to claim 27 wherein each ci:! either curved or flat but each having a mirrored fmiish.

29. A light assembly according to claim 28 wherein there are tou: LED's in one housing.

30. A light assembly according to claim 29 wherein, the LED's arc loiated on a flat surface of the housing.

31. A light assembly according to claim 30 wherein, the light housing is manufactured from a glass body coated with aluminium. 21