Specifications1. SMD 28352. 65lm-75lm/w, CRI>803.Cut hole size : suitble to D50 -210mm; 4. Lighting technic: side light emitting technic . 5. Material : Aluminum+ PC+PS light guide Advantage :1. The springs can slide along the rails and can suitable to the all size hole size from Diameter 50mm to 210mm; 2. Slime and good looking 3. Driver back carry and easy for exchange . Product features1.Using high lumen SMD light source high intensity aluminum shell,fast heating.2.Using good reflectivity super thin, super bright LGP which make the lights more equally.3.Low voltage and constant current driver, no glare the light is soft.4.Launch in 0.01sec, no flashing, no noise, no radiation. Energy saving,and environmental.5.This product can show high brightness, without seeing the lamp itself.