... LED down light with multi-chips integrated emitter with high luminance>80Lm/W. ... cleanCold light source design, non-thermal radiation, pairs of eyes and skin without any harm. No mercury ... elements, environmental protection.6. Universal standardStandard size of diameter rate of cutting hole 2'', 2.5'', 3'', 4 ... 15WJS-DL6A-20WInput voltage AC85V~265V, 50-60HzEfficiency of power>90% with life over 40,000 ...