JP2000030511A - Street lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the installation span of street lamps at a value four times as large as apparatus height while keeping a uniformity ratio on road surface required in relation to direct light from a light source and reflected light. SOLUTION: The maximum luminous intensity value of a street lamp is available at a vertical angle (θ) between 60 and 65 degrees, and a horizontal angle (ϕ) between 70 and 80 degrees, and the value is between 600 and 650 cd/klm. The maximum luminous intensity value along a vertical plane (ϕ=0) is available at θbetween 20 and 30 degrees, and the value is between 320 and 380 cd/klm. At the same time, the ranges of vertical and horizontal angles for giving a luminous intensity value equal to or larger than 300 cd/klm are taken so that the horizontal angles are between 20 and 30 degrees at a vertical angle equal to 0, between 20 and 35 degrees at a vertical angle equal to 10 degrees, between 25 and 35 degrees at a vertical angle equal to 20 degrees, between 25 and 40 degrees at a vertical angle equal to 30 degrees, between 25 and 45 degrees at a vertical angle 40 degrees, between 35 and 60 degrees at a vertical angle equal to 60 degrees, between 40 and 70 degrees at a vertical angle equal to 70 degrees, and between 40 and 70 degrees at a vertical angle equal to 80 degrees, respectively. Also, the intensity is equal to or less than 10 cd/klm at a vertical angle equal to or above 85 degrees.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road light for illuminating a road surface.

[0002]

2. Description of the Related Art A road light houses a reflector inside a housing,
It is composed of a light source such as a high-pressure sodium lamp provided inside the reflector and a mortar-shaped glass globe below the reflector. A road light is illumination that radiates light emitted from a light source on a road surface of a road from a width direction to a longitudinal direction by direct light or light reflected by a reflector. Generally, it is erected at the center of the road or at the shoulder of the road, and is disposed along the road at a required interval of about 30 to 35 m.

[0003]

The conventional road lights are arranged along the road at intervals of about 30 to 35 m as described above, and when the intervals are further increased, they are arranged below the reflector. It was necessary to irradiate light in the longitudinal direction of the road with a light control body such as a prism and a louver provided on the glass glove provided. However, in the method of irradiating light to the far side in the longitudinal direction of the road using a prism or a louver, a high appliance efficiency cannot be expected due to the transmittance of the prism and the reflectance of the louver. In addition, when the prism is provided, uncontrollable light increases, which causes a problem of light leakage out of the road surface.

In recent years, there has been a movement to restrict light leakage to the sky due to the problem of light pollution. For this reason, in many cases, flat glass is provided on the front surface of a reflector instead of a conventional mortar-shaped glass glove. It has become to. When flat glass is used, it is expected that the reflectance will increase sharply as the incident angle of light increases, and that the efficiency of the device will decrease sharply. Therefore, it is considered that the limit of the light irradiation direction when flat glass is used is a vertical angle of about 70 degrees. Further, even when a conventional mortar-shaped glove is used, an increase in the luminous intensity value in the vertical direction larger than 70 degrees leads to an increase in glare. Taking this into consideration, the installation interval is less than four times the installation height of the equipment, and there is a problem that the initial equipment cost increases and the power consumption increases.

When the reflector of a road light is composed of a multi-stage parabolic reflecting surface, each parabolic reflecting surface has a line connecting the position on the road surface irradiated with the reflected light parallel to the road. (FIG. 15A). But,
Assuming that the position on the road surface irradiated by the reflected light is parallel to the road, the illuminance luminance conversion coefficient changes along the cross section of the road, and as the vehicle approaches the lane end (shoulder or median strip) on the passing lane side The brightness will be reduced. As a result, a luminance gradient was generated in the cross direction of the road, and high uniformity could not be obtained.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a road light installation space while maintaining a required road surface uniformity by a direct light and a reflected light from a light source without disposing a light control body such as a prism or a louver. Is to provide a road light that can be widened.

[0007]

According to a first aspect of the present invention, there is provided a road light for illuminating a road surface of a road by illuminating the road surface with a light source. , The maximum luminous intensity value is within a vertical angle (θ) of 60 to 65 ° and a horizontal angle (φ) of 70 to 80 °, and the luminous intensity value is 600
650 cd / klm, the maximum luminous intensity in the vertical plane (φ = 0) is 20 <θ <30 °, and the luminous intensity is 320 to
380 cd / klm.

[0008] According to the road light configured as described above, the installation interval can be four times the installation height of the equipment.
Initial equipment costs and running costs can be reduced. Also, since the installation interval can be wider than before,
Car crashes to the poles of the road lights are reduced. Also, since the installation interval is widened, the number of lights of instruments that can be seen is reduced,
Glare can be reduced.

According to a second aspect of the present invention, in the road light according to the first aspect, the range of the vertical angle and the horizontal angle at which the luminous intensity value is equal to or more than 300 cd / klm is set to a horizontal angle of 20 ° to 30 ° at a vertical angle of 0 °.
Horizontal angle 20-35 ° at vertical angle 10 °, horizontal angle 25-35 ° at vertical angle 20 °, horizontal angle 25-40 at vertical angle 30 °
°, vertical angle 40 °, horizontal angle 25-45 °, vertical angle 50 °
With a horizontal angle of 30 to 50 °, vertical angle of 60 ° with a horizontal angle of 35 to 6
0 °, vertical angle 70 °, horizontal angle 40-70 °, vertical angle 80
Angle between 40 and 70 degrees, and 10 degrees when the vertical angle is 85 degrees or more.
cd / klm or less. Thus, a luminosity value of 300
By setting the ranges of the vertical angle and the horizontal angle that are equal to or more than cd / klm, a luminance gradient hardly occurs in the cross direction of the road, and a high degree of uniformity can be obtained.

According to a third aspect of the present invention, there is provided a road light having a luminous intensity value obtained by multiplying the luminous intensity value of each of the vertical angle θ and the horizontal angle φ by a positive number. Thus, each vertical angle θ,
Since the luminous intensity has a luminous intensity value obtained by multiplying the luminous intensity value of the horizontal angle φ by a positive number, the luminous intensity value can be increased, and the installation interval can be further increased. According to a fourth aspect of the present invention, there is provided a road light according to the first or second aspect, having a light distribution rotated in a vertical direction in a cross section of the road with the center of the light source as an origin. in this way,
Since the center of the light source is set as the origin and the light distribution is rotated in the vertical direction in the cross section of the road, high appliance efficiency can be obtained.

According to a fifth aspect of the present invention, there is provided a road light for illuminating a road surface by illuminating a road surface with a light source accommodated in the reflective plate, wherein the reflective plate is a multi-stage reflective surface extending in a direction transverse to the road. Each reflecting surface is composed of a paraboloid whose focal point is the center of the light source, and the lowermost reflecting surface is directed so that light is reflected on a road surface having a vertical angle of 70 °, and the lowermost reflecting surface Has a vertical angle of about 90 °, the angle of the cross section of this reflective surface centered on the light source is 5.5-6.5 °, and the reflective surface located second from the opening has a vertical angle of 65 °. The light is directed so as to be reflected on the road surface in the direction of °, the angle of the cross section of the reflecting surface around the light source is set to 10.0 to 11.0 °, and the center of the light source and the lowermost reflecting surface The angle formed by the lower end is 70 ° from the vertical direction.

[0012] According to the road light configured as described above, the installation interval can be four times the installation height of the appliance.
Initial equipment costs and running costs can be reduced. Also, since the installation interval can be wider than before,
Car crashes to the poles of the road lights are reduced. Also, since the installation interval is widened, the number of lights of instruments that can be seen is reduced,
Glare can be reduced.

According to a sixth aspect of the present invention, there is provided a road light for illuminating a road surface by illuminating a road surface with a light source accommodated in the reflection plate, wherein the reflection plate has a multi-stage reflection surface extending in a transverse direction of the road. And each reflection surface is formed of a paraboloid having the center of the light source as a focal point, and the position at which the reflected light reflected by each reflection surface reaches the road surface is closer to the reflection plate opening, It is characterized in that the reflecting surface is oriented so as to be farther in the longitudinal direction of the road and in the direction of the cross section of the road.

As described above, the reflecting surface is set such that the position where the reflected light reflected by each reflecting surface reaches the road surface becomes farther in the longitudinal direction of the road and in the cross-sectional direction of the road as the reflecting surface is closer to the opening of the reflecting plate. Since the vehicle is pointed, the illuminance on the passing lane side can be increased, and the luminance of the road surface can be increased. In particular, it is possible to improve the brightness at the lane end of the overtaking lane, thereby improving the uniformity of the entire road surface.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A road lamp according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1A is an explanatory diagram showing a vertical angle θ in a road light according to a first embodiment of the present invention, FIG. 1B is an explanatory diagram showing a horizontal angle φ, and FIG.
5 are lighting characteristic diagrams of the first embodiment of the present invention, FIG. 6 is a road configuration diagram when lighting is calculated using the light distribution shown in FIGS. 2 to 5, and FIG. 7 is FIG. FIG. 8 is a front view of a road light, FIG. 9 is a bottom view of FIG. 8, and FIG. 10 is a side view of FIG.

As shown in FIG. 1, a road light (apparatus) 1 is supported by a pole 2 and irradiates a road surface of a road 3 with light. In the figure, a vertical angle θ and a horizontal angle φ are shown. As shown in FIGS. 8 and 9, the road light 1 has a main body 4.
A front glass 5 is attached to an opening on the lower surface of the light emitting device, and a reflector 5 is housed above the front glass. The main body 4 is provided with a socket 7 protruding into the reflection plate 6, and a lamp (light source) 8 is connected to the socket 7. A canopy 9 is attached to the upper part of the main body 4 by a hinge 10 so as to be openable and closable so that the lamp can be replaced. Further, a plate 2 a provided on the upper end of the pole 2 is fixed to the lower surface of the main body 4 by bolts and nuts 11. Reference numeral 12 denotes a main body power supply hole, and reference numeral 13 denotes a filter hole.

The above-described road light 1 can be installed at intervals of four times the installation height H of the equipment, and the following conditions are set. That is, the maximum luminous intensity value is within the vertical angle (θ) of 60 to 65 ° and the horizontal angle (φ) of 70 to 80 °, and the luminous intensity value is 600 to 650 cd / klm. The maximum luminous intensity value in the vertical plane (φ = 0) is 20 <θ <
30 ° and its luminosity value is 320-380 cd / kl
m.

The range of the vertical angle and horizontal angle at which the luminous intensity value is 300 cd / klm or more is defined as a horizontal angle of 20 to 30 ° at a vertical angle of 0 °, a horizontal angle of 20 to 35 ° at a vertical angle of 10 °, and a vertical angle of 20 °. ° horizontal angle 25-35 °, vertical angle 30 ° horizontal angle 25-40 °, vertical angle 40 ° horizontal angle 25-45 °,
Horizontal angle of 30-50 ° at vertical angle of 50 °, horizontal angle of 35-60 ° at vertical angle of 60 °, horizontal angle of 40-70 at vertical angle of 70 °
°, vertical angle 80 °, horizontal angle 40-70 °, vertical angle 8
At 5 ° or more, 10 cd / klm or less.

FIGS. 2 to 5 show light distribution characteristics of the above-mentioned road lamp satisfying the above conditions. In the characteristic diagram of FIG. 2, the device efficiency is 73.8%, the upper luminous flux is 0.0%, and the lower luminous flux is 73.8.
%, Direct luminous intensity 139.5 cd / klm, maximum luminous intensity 63
It is 8.6 cd / klm. Table 1 shows the luminous intensity of the vertical plane with respect to the vertical angle θ.

[0020]

[Table 1]

In this case, from the light distribution charts in Table 1 and FIG. 2, the maximum luminous intensity value is at a vertical angle (θ) of 65 ° and a horizontal angle (φ) of 75 °, and the luminous intensity value is 638.6 cd / klm. . The maximum luminous intensity value in the vertical plane (φ = 0) is 25 °, and the luminous intensity value is 353 cd / klm. In this case, the range of the vertical angle and the horizontal angle at which the luminous intensity value is equal to or more than 300 cd / klm is determined as shown in the luminous intensity distribution diagram of FIG. As a result, as shown in FIG.
, The illuminance of 5 lx is obtained, and the installation interval of the road light 1 can be set to 4H. In the figure, the total luminous flux is 26500 lm, the maintenance rate is 1.00, the mounting angle is 0.0 °,
The maximum illuminance is 48.2 lm, and the mark ● indicates the position of the maximum illuminance. In the illumination rate curve diagram of FIG. 5, the left side is the sidewalk side, and the right side is the roadside side, and the mounting angle α of the road light is 0.0.
°.

As shown in FIG. 6, the road configuration when lighting is calculated from the above light distribution characteristics is such that the height of the pole 2 is 12 m,
The distance from the sidewalk side end of the road light 1 to the illumination center position is 0.5 m, the shoulder 14 is 2.5 m, and the road 3 is composed of lanes and lanes, and the width of one lane is 3.5 m. Table 2 shows design conditions and road surface lighting characteristics of the road lighting equipment.

[0023]

[Table 2]

The results of calculating the road surface luminance from the light distribution characteristics described above are as shown in Table 3, and a direct road surface luminance distribution diagram shown in FIG. 7 is obtained. This shows that high optical performance with an average luminance of 0.99 cd / m ² , an overall uniformity of 0.51 and a lane axis uniformity of 0.67 is obtained at an installation interval of 4H.

[0025]

[Table 3]

As described above, according to this embodiment, the installation interval can be set to four times the installation height of the appliance.
Initial equipment costs and running costs can be reduced. Also, since the installation interval can be wider than before,
Car crashes to the poles of the road lights are reduced. Also, since the installation interval is widened, the number of lights of instruments that can be seen is reduced,
Glare can be reduced.

The luminous intensity may be obtained by multiplying the luminous intensity of each of the vertical angle θ and the horizontal angle φ by a positive number. Further, the light distribution may be such that the center of the light source is the origin, and the light distribution is rotated (rotated in the vertical direction) in the cross section of the road. A second embodiment of the present invention will be described with reference to FIGS. FIG. 11 is a conceptual diagram showing the shape of a reflector of a road light according to a second embodiment of the present invention, FIG. 12 (a) is a cross-sectional view of the reflector shown in FIG. 11, and FIG. FIG.

This road lamp contains a high-pressure sodium lamp 220 W as a light source 8 in a reflector 16. Also,
As shown in FIG. 12A, the reflection plate 16 is composed of a multi-stage reflection surface 17 extending along the road crossing direction, and each reflection surface 17 is formed of a paraboloid having the center of the light source 8 as a focal point. The reflecting surface 17a of the (opening) is directed so that light is reflected on a road surface in the direction of a vertical angle of 70 °, and the surface normal at the lowermost end of the reflecting surface is approximately 90 ° as shown in FIG. Becomes In addition, the angle a of the cross section of the reflection surface 17a about the light source 8 is set to 5.5 to 6.5 °, and the reflection surface 17b located second from the opening allows light to travel on a road surface in the direction of a vertical angle of 65 °. The angle b of the cross section of the reflection surface 17b about the light source 8 is set to 10.0 to 11.0 °, and the center of the light source 8 and the lowermost end of the lowermost reflection surface 17a are oriented. Is 70 ° (opening angle 70 °) from the vertical direction.

Also in this embodiment, the characteristic diagrams as shown in FIGS. 2 to 7 can be obtained from the first embodiment, and similarly high optical performance can be obtained. A third embodiment of the present invention will be described with reference to FIGS. FIG.
3 is an explanatory diagram showing the reflection characteristics of the road surface due to road lights (distribution of the illuminance luminance conversion coefficient), FIG. 14 is an explanatory diagram showing the relationship between the illuminance of the road surface and the luminance seen by the observer, and FIG. FIG. 9B is an explanatory diagram showing an irradiation position on a road surface in an example, and FIG. 10B is an explanatory diagram showing an irradiation position on a road surface according to the third embodiment of this invention.

As in the case of the second embodiment, this road light accommodates a high-pressure sodium lamp 220W as a light source 8 in a reflector 16 and the reflector 16 is composed of a multi-stage reflective surface extending along the road crossing direction. Each reflecting surface 17 is composed of a paraboloid whose focal point is at the center of the lamp. Conventionally, in the design of a reflector for a road light, the target irradiation position of the strip-shaped reflecting surface constituting the reflector is the center of the lane as shown in FIG. Therefore, as shown in FIG.
Even if the illuminance is the same, the contribution to the luminance decreases as the light 21 moves farther in the cross-section direction of the road, and the contribution to the luminance increases as the light 22 approaches.

Therefore, in this embodiment, FIG.
As shown in (b), the position at which the reflected light reflected by each reflecting surface 17 reaches the road surface becomes farther in the longitudinal direction of the road and in the cross-sectional direction of the road as the reflecting surface is closer to the opening of the reflecting plate 16. The reflecting surface 17 is directed. As a result, it is possible to improve a low-brightness portion on the road surface generated at the road end on the opposite side where the device is installed, to increase the mounting interval by improving the uniformity, and to reduce initial equipment costs and running costs. .

Also in this embodiment, the characteristic diagrams as shown in FIGS. 2 to 7 can be obtained from the first embodiment, and similarly high optical performance can be obtained.

[0033]

According to the road light according to the first aspect of the present invention, the maximum luminous intensity value is within the vertical angle (θ) of 60 to 65 ° and the horizontal angle (φ) of 70 to 80 °. Is 600-6
50 cd / klm, the maximum luminous intensity in the vertical plane (φ = 0) is 20 <θ <30 °, and the luminous intensity is 320 to 38
By setting it to 0 cd / klm, it is possible to set the installation interval to four times the installation height of the equipment, and it is possible to reduce initial equipment costs and running costs. Also,
Since the installation interval can be made wider than before, the collision of a vehicle with a road light pole is reduced. In addition, since the installation intervals are widened, the number of lights of the instruments that can be seen is reduced, and glare can be reduced.

According to the second aspect, the luminous intensity value is 300 cd / kl.
m, the range of vertical and horizontal angles is 0 ° vertical angle.
20 to 30 ° horizontal angle, 10 ° vertical angle 20 to 3 horizontal angle
5 °, vertical angle 20 °, horizontal angle 25-35 °, vertical angle 30
25 ° to 45 ° horizontal angle, 25 ° horizontal angle to 40 ° vertical angle
45 °, vertical angle 50 °, horizontal angle 30-50 °, vertical angle 6
0 ° horizontal angle 35-60 °, vertical angle 70 ° horizontal angle 40
Since the horizontal angle is 40 to 70 ° at a vertical angle of 80 ° and the horizontal angle is 40 to 70 ° at a vertical angle of 80 °, and the luminance is 10 cd / klm or less at a vertical angle of 85 ° or more, a luminance gradient hardly occurs in a direction crossing the road, and a high degree of uniformity can be obtained.

According to the third aspect, since the luminous intensity value obtained by multiplying the luminous intensity value of each of the vertical angle θ and the horizontal angle φ by a positive number can be increased, the luminous intensity value can be increased and the installation interval can be further increased. . According to claim 4, since the center of the light source is set as the origin and the light distribution is rotated in the vertical direction in the cross section of the road, high appliance efficiency can be obtained.

According to the fifth aspect of the present invention, the reflecting plate is constituted by a multi-stage reflecting surface extending along the crossing direction of the road, and each reflecting surface is constituted by a paraboloid having the center of the light source as a focal point. The lowermost reflecting surface is oriented so that light is reflected on a road surface in the direction of a vertical angle of 70 °, and the surface normal at the lowermost portion of the reflecting surface is at a vertical angle of about 90 °. The angle at the center is 5.5-6.5 °, and the reflecting surface located second from the opening is directed so that light is reflected on a road surface in the direction of a vertical angle of 65 °, and a cross section of this reflecting surface The angle between the center of the light source is 10.0-11.0 °, and the angle between the center of the light source and the lowermost end of the lowermost reflection surface is 70 ° from the vertical direction. Four times the initial cost, reducing initial equipment costs and running costs. It is possible. In addition, since the installation interval can be made wider than before, the collision of a vehicle with a pole of a road light is reduced. In addition, since the installation intervals are widened, the number of lights of the instruments that can be seen is reduced, and glare can be reduced.

According to the road lamp of the sixth aspect of the present invention, the position at which the reflected light reflected by each reflecting surface reaches the road surface is closer to the reflecting plate opening, the longitudinal direction of the road, and the road. Since the reflecting surface is directed so as to be farther in the cross-sectional direction, the illuminance on the passing lane side can be increased, and the luminance of the road surface can be increased. In particular, it is possible to improve the brightness at the lane end of the overtaking lane, thereby improving the uniformity of the entire road surface.

[Brief description of the drawings]

FIG. 1A is an explanatory diagram showing a vertical angle θ in a road light according to a first embodiment of the present invention, and FIG.
FIG.

FIG. 2 is a light distribution diagram according to the embodiment of the present invention.

FIG. 3 is an isoluminance curve diagram of the embodiment of the present invention.

FIG. 4 is a luminous intensity distribution diagram according to the embodiment of the present invention.

FIG. 5 is an illumination rate curve diagram according to the embodiment of the present invention.

FIG. 6 is a road configuration diagram of a widely-spaced road light according to the embodiment of the present invention.

FIG. 7 is a direct road surface luminance distribution diagram according to the embodiment of the present invention.

FIG. 8 is a front view of a road light according to the embodiment of the present invention.

FIG. 9 is a bottom view of FIG.

FIG. 10 is a side view of FIG.

FIG. 11 is an enlarged view showing a shape of a reflector of a road light according to a second embodiment of the present invention.

12A is a sectional view of the reflector shown in FIG. 11, FIG.
(B) is an enlarged view of the opening.

FIG. 13 is an explanatory diagram showing reflection characteristics of a road surface by a road lamp (distribution of an illuminance-luminance conversion coefficient).

FIG. 14 is an explanatory diagram showing the relationship between the illuminance on the road surface and the luminance seen by the observer.

FIG. 15 (a) is an explanatory diagram showing an irradiation position on a road surface in a conventional example, and FIG. 15 (b) is an explanatory diagram showing an irradiation position on a road surface in a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Road light 2 Pole 3 Road 6,16 Reflector 8 Light source 17,17a, 17b Reflective surface

Claims (6)

[Claims] 1. A road lamp which accommodates a light source in a reflector and illuminates the road surface by irradiating the road surface with light, wherein the maximum luminous intensity value is within a vertical angle (θ) of 60 to 65 ° and a horizontal angle (φ) of 70. ~ 80 °
And its luminous intensity value is from 600 to 650 cd / klm, and the maximum luminous intensity value in the vertical plane (φ = 0) is 20 <θ <30 °
And a luminous intensity value of 320 to 380 cd / klm. 2. A range of a vertical angle and a horizontal angle at which the luminous intensity value is equal to or more than 300 cd / klm is defined as a vertical angle of 0 ° and a horizontal angle of 20 degrees.
30 °, vertical angle 10 °, horizontal angle 20-35 °, vertical angle 20 °, horizontal angle 25-35 °, vertical angle 30 °, horizontal angle 2
5-40 °, vertical angle 40 °, horizontal angle 25-45 °, vertical angle 50 °, horizontal angle 30-50 °, vertical angle 60 °, horizontal angle 35-60 °, vertical angle 70 °, horizontal angle 40- The streetlight according to claim 1, wherein the horizontal angle is 70 to 70 degrees, the horizontal angle is 80 to 70 degrees, and the horizontal angle is 40 to 70 degrees, and the vertical angle is 85 degrees or more and 10 cd / klm or less. 3. The roadlight according to claim 1, having a luminosity value obtained by multiplying the luminosity value of each of the vertical angle θ and the horizontal angle φ by a positive number. 4. The roadlight according to claim 1, having a light distribution rotated in a vertical direction in a cross section of the road with the center of the light source as an origin. 5. A road lamp for receiving a light source in a reflector and irradiating the road surface with light by illuminating the road surface, wherein the reflector is composed of a multi-stage reflective surface extending in a direction crossing the road, and each reflective surface is provided. Consists of a paraboloid whose focal point is the center of the light source, the lowermost reflecting surface is directed so that light is reflected on a road surface having a vertical angle of 70 °, and the surface normal at the lowermost end of the reflecting surface is a vertical angle. The angle of the cross section of the reflection surface around the light source is set to 5.5 to 6.5 °, and the reflection surface located second from the opening has light on a road surface having a vertical angle of 65 °. The angle of the cross section of the reflecting surface with respect to the light source is 10.0 to 11.0 °, and the angle between the center of the light source and the lowermost end of the lowermost reflecting surface is vertical. From 70 °
A road light characterized by the following. 6. A road lamp for receiving a light source in a reflector and illuminating a road surface by irradiating light on the road surface, wherein the reflector is composed of a multi-stage reflective surface extending in a direction crossing the road. Is a paraboloid whose focal point is the center of the light source, and the position where the reflected light reflected by each reflecting surface reaches the road surface is closer to the reflecting plate opening, the longitudinal direction of the road and the cross-sectional direction of the road. A road light characterized by directing a reflection surface so as to be far away from the vehicle.