... no Radiation 4. High-tech COB LED Light, COB Downlight, ultra bright, good heat conductive High Quality Detailed Product Description1.90- ... )2) unique optical design, no light pollution, glare-free, uniform light field, no strobe3) above 85% lamp efficiency4) above 80% power efficiency ... , more than 70% compared to fluorescent lights. , COB LED Light, COB Downlight, ultra bright, good heat conductive