Our fiercest, most powerful book light ever, the HammerHead LED Book Light derives its moniker from its distinctive light bar. Use its six LEDs in one of two brightness settings to scare away the darkness. With the intense bright white light you've come to expect from Mighty Bright, the HammerHead packs a punch in its small frame. No need to be intimated by the beast - this one requires no maintenance. With LEDs that last 100,000 hours, included batteries, and an optional AC adapter, you won't tire out the mighty HammerHead any time soon. So position that light bar just where you want it, press that button, and illuminate!