20pcs 90 degree Lens Reflector Collimator W/Holder For 1~5w LED – Black
-Lens Material: PMMA,
-Lens Transmittance angle: 90 Degree
-Lens Diameter: 20mm
-Holder Diameter: 21.3mm
-Holder Height: 13mm
-Transmittance rate : 98%
lens and LED lamp beads are two separate objects, but really inseparable in the application; function of a lens is capable LED lamp beads light angle (usually 60-120 degrees) into a condenser 5 degrees again want to get to 120 degrees at any angle, the light is more concentrated, brighter and shoot farther. the smaller the angle, the more converging!