>>>>Anyone able to do some light output measurements?
Hopefully someone with a light-measuring sphere (or bathroom) will post actual lumen output, but my 3C moirders the 3D in throw, even on a white wall (and tested outside last night). I don’t have the equipment for a real lumen readout. For my eyeball test, 3D had the brand-new defiant batteries with maybe 3 minutes of run time on them; 3C was with only one 18650 (with the spacer mod), a fully charged fasttech unprotected Samsung 2600 pink.
The 18650 spacer mod for the 3C is really simple to do and totally worth it. Lightens up the weight considerably and no more throwaway alkalines! (You can also just screw a 26650 on to the 3C head with the BLF A8 battery tube.)
Haven’t tried anything with the 3D tube yet, but it’s cavernous!
ID of the 3D tube? I have not measured, but I can tell you it's the same (within a couple thou), as a Maglite D tube. A maglite switch fits in just like it would fit in a Maglite, with a hint of drag. A Maglite ID is like 34.15mm, if that helps.
I snagged two of them at the Home Depot in Richardson, TX at Plano Rd & Buckingham. They were stored on the high boxes above the flashlight section. Dude with the Big Stairs got them down. BTW, they come six to a box, not five.
Both of mine were DOA due to the o-ring problem mentioned in post #19!!! Something tells me this is going to be causing Home Depot a LOT of grief.
Crammed it into the Sphere ’o Many Mysteries. Using their D batteries: