What is the diameter of the D4? I’d expect that even with a 18350 tube, it might be a bit thick and clunky for key ring use.
But hey, patmurris, it was quite a while back that Dale had his Texas Poker AAA light reaching over 1k+ lumens OTF. With today’s emitters, it might not be long before 2k+ lumens OTF is possible from a build or mod. Especially now that some of the smaller cells are trending upward in both capacity and current handling. If/when that “bump” reaches the 10180, there won’t be anything left to stop us from getting 2k+ in a light the size of a BLF 348!
EDIT: Just now looking at the CREE PCT I think it might already be possible, with a XHP50.2 K4 bin wired at 6V, and a couple 10180, in a AAA-size light. The relatively low Vf compared to 2S Li-ion might push output over 2A, right at the edge of ~2k lumens.
-When you’re arrive home at weekend with a new flashlight and your mother says “another one?”!
-When you carry a backpack just to bring 1 or 2 flashlights when going to the beach…during daylight!
-When the family asks you to order them new flashlights!
-When you have 2 flashlights on your bedside and use them instead of the room lights!
-When you clean (vacuum clean) your house using at least 3 flashlights to see the dust and clean it!
-When you talk so much about flashlights, and you buy them, that…your girlfriend makes a strip for you, in a dark room, just using a flashlight on the lowest mode :partying_face:
• You struggle with an unfitting diffuser on your favorite tinted light to use it as a bedside light when there’s a perfectly usable desk lamp there, hidden under a centimeter of dust
• You wash the dishes after midnight just to have an excuse to enjoy some ceiling bounce without someone else in the house complaining that it’s dark or turning on the lights without you asking (and thinking they’re doing you a favor)
• Your home come twilight/dusk has no lamps on at all because you’re using your torch(es), so to an outsider it looks like there’s nobody home
All of these are true for me, and have been since May or so