Big Blue. My tricked out Malkoff 3-4 D cell does extremely well. Got prescription grade glass with anti glare coating. Also features a trick low impedance switch I bought a long time ago. Sorry bout the blurry pics. Will post some better later. I use this light near every night. It STILL had the original D cells in it I think they were some kind of ancient Rayovac. Took them out from fear of fire. Cleaned up Big Blue. The beam diameter from Big Blue is literally as big as my house. M*gz are as reliable as a framing hammer. SF's are very expensive hammers. The Fury is a holster worthy light.