Rechargeable Emergency LED Bulbsbuilt-in 2600mAh lithium battery, can work continuously for 10-15 hours.Brightness DimmableThree light colors-Warm(3000K), Warm white(4500K) and white(6500K) light can be adjusted by push button, high(100%), medium (70%)and low(50%)ENERGY SAVING & LONG LIFESPAN : Equivalent to 60W incandescent bulb, up to 85% energy saving and reducing re-lamp replacement frequency, up to 15,000 hours lifespan, last over 10 years (based on 4 hours per day).Emergency light modeOur emergency bulbs come with an infrared remote control. Easy for you to control the color temperature and brightness of the bulb.Built in lithium battery,rechargeable LED Light Bulb that keeps on illuminating even without electricity supply.