The Original Mighty Bright HammerHead Clip On Book Light Reading Light, 6 Bright White LEDs, 2 Light Levels, Super Flexible, Perfect for Handymen, Kids, Craft Projects, Battery or AC Adapter (Blue) Six energy-efficient LEDs cast 28 lumens of bright white light Durable LEDs last 100,000 hours - no replacement necessary Two brightness settings Precisely engineered optical grade lens spreads light evenly Sturdy clip grips almost anything