... not cause eye fatique. It's trully environmental friendly "Green Lighting"4.Full Color Temperature:2700K ~ 6500K red, green, blue, yellow ... time≤ 0.5 seconds, no need to preheat, instant start lighting can be.8.The Color Is Good, color rendering index ... mines, underground parking, underground warehouses, and other underground places of lighting. 40W~200W Long Performance Life Induction Ceiling Lamp