Just mentioned in another thread that the F13 is nice and throwy. Mod it. Off-the-rack it kinda stinks, but is a beautiful host. Takes a 26650, but comes with a sleeve for an 18650, and the ones I got even had carriers for 3×AAA!
Is there something I’m missing, or are you are both wrong?
Why can’t you make a 26650 tube for (many) 18650 lights without redesigning the head? The light will almost certainly be uglier, and longer, and need some sort of spacer to bridge the connection between the positive contact on the driver. Hmm, or maybe you could do something more interesting with the added length. Side switch?
It causes too much problems.
You need thicker tube
You have to add extra length
You have to bore tube only from one side
You need very long driver spring
And all this without any preferences.
If 18650 ligths have 17-20mm driver, 26650 can use 25-28mm and this gives more opportunities.
Of course it can be done without redesigning the head, it’s just not worth the effort for the tiny market that might be interested. All you need is for the larger tube to have a smaller thread adaptor and an inner projection to extend the battery contact. The old head won’t know the difference.
I have several of this host with different emitters. This particular one is a good thrower. I also have one with an XHP 70.2 which is nice for flood. All of mine have the 26650 tube