BLACK+DECKER PureOptics Exalt Flash 5W Flicker-Free Natural Daylight LED Desk Lamp, USB Port, Detachable & Rechargeable Lamp Head, 4 Dimming Levels (267 Lumens), Black (LED5ELIGHT-BLK) LED simulates natural daylight for reduced eye strain and reveals rich, true-to-life colors PureOptics&#8482; LEDs uses up to 85% less energy than incandescent bulbs and lasts up to 15 years Flicker-free, extra-wide light zone that is glare-free, shadow-free, and halo-free Easy One Touch Control: one tap powers the lamp on to your last brightness setting, and a light press and hold flips through three dimmable brightness levels Rechargeable lamp head is removable and automatically powers on during outages for up to an hour of lighting