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Things to consider when using road lighting

Light distribution of street lamps
For convenience, we describe the light distribution of street lamps in terms of the degree of cutoff or the degree of limitation on the intensity of glare. Since the tighter the cutoff, the lower the angle of the beam, this is a more appropriate way of describing the light distribution.

Since the tail of the light spot on a smooth road is longer, it is more economical to use street lamps with a high-angle beam and non-cutoff distribution when the distance between street lamps is large, but the glare will be too strong. In the UK, half-cutoff distribution lamps are generally used because they can make the distance between lamps and the installation height appropriately proportional. Cutoff street lamps may cost 30% more, but should be considered in the following situations:

(1) If the road surface is rough and light-colored:

(2) If the road is uneven and the high-angle light intensity causes glare, because the street lamps on the hillside appear to the driver to be in the middle of the road:

(3) When the driver sees the lamp at about eye level when driving on an elevated highway;

(4) The street lamps are small and isolated, such as unlit paths connected in a circle. However, if it is on a wide road, or on a road with lights in the middle of a double one-way lane, especially a road with tree shade, it may be better to use this non-cutting light lamp.

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