... HW052350 fresnel lens for led light specificationsDiamter: 52mmThickness: 2mmMaterial: PMMAFacet spacing:0.5mmFocal length: 35mmThe LED lampshade, its principle ... thin structure of the fresnel lens, causes the light the transmissibility compared to traditional high of many, ... lamp, floodlight, flashlight, projection table, projection clock, torch light, solar street lamps, miner's lamp, garden lights, ...