Lens material of roadway fixtures：
Glass lens: high temperature resistance, transmission rate, but heavy weight, fragile and high cost.
PC or PMMA material roadway fixtures lens: it collects light through injection molding, and can reduce light spots and yellow spots. Cost is lower , but the transmittance and high temperature resistance are weaker than glass lens.
Specifications of roadway fixtures lens：
Roadway fixtures lens are: 60 degrees, 80 degrees, 100 degrees, 120 degrees;
Generally, the height roadway fixtures poles are 10-12M on of main road, the distance between roadway fixtures poles are 30-35M, and the lens angle is 100-120 degrees.
Optic types of lens：
Circular optical: generally used in courtyards, parks, narrow roads where the irradiation range and illuminance requirements are not high.
Oval light optical: usually used for lanes and sidewalks.
Rectangular optical: used in motor vehicle lanes, the LED light is effectively used, the light is evenly distributed on the road, and the optical is uniformity.
The roadway fixtures lens require the light utilization rate, the condensing angle and the uniformity of the light spot. Whether the illumination meets the standard is a problem that roadway fixtures manufacturers need to consider.
Roadway fixture Lens appearance specifications:
Single lens: Single roadway fixtures lens combined use (lens and LED one to one).
Roadway fixtures modular lens: In order to effectively use the space of roadway fixtures and reduce the weight of roadway fixtures, some manufacturers first adopted roadway fixtures module lenses, of which the 4 * 7 structure was the most.
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