High lighting efficacy.The incident light efficacy that a road surface is subject to is an important factor in an outdoor luminaire since there are no ceilings and walls. GLLL LED are highly directional and light distribution is therefore easy to control so that only the area of the road that needs to be lit is illuminated. Unlike mercury lamps and fluorescent lamps, lighting efficacy (utilization factor) can be increased while reducing power consumption (less CO2 emissions)

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