After receiving my maglite 6D cell I immediately looked at how the bulb to flashlight interface was designed and found that it was still the traditional style(not the wire prongs). So I I got TLE-6EX FROM terralux in hopes of getting better battery life and a non-dimming light. I wasn't disappointed, the light is noticeably whiter than the incandescent bulb and it's still on its first set of batteries after about 1 hour usage each week since I got it 2 months ago.