The Nite Ize LED Upgrade Kit contains everything you need to turn your incandescent AA Mini Maglite into a super-efficient LED flashlight. Just replace your AA Mini Maglite's existing bulb with this ultra bright, two pin/three bulb LED module (simple instructions on the package) and you're done. You'll instantly enjoy superior illumination-the white LED bulbs emit a high-quality, bright light (as opposed to the dimmer yellow glow of incandescent bulbs). With its long (100,000 hour) life, you'll never have to replace the bulb again. And, because LED bulbs use less power, your AA batteries will last four times longer.