I bought the whole modded light from lighthound.
Dont like that the bulb+holder falls out when the head gets opened to remove the batt, also that (sometimes) there is a short disconnection when focusing the light (but its a bit be4e the light is focused, so does not interfere with usage).
Compared to my other "normal" incans in this size (some cheap models from DX and a SF 6P) its by far the brightest one.
Every 18650 I have fits in and the light works good with them.
Its a very good incan and the 18650 is the best rechargeable in this light size class, imho
Quick and dirty beam comparison shots:
upper row:
left pic: 18650 Scorpion left, Cree P4@1A right
right pic: reversed
lower row:
left: 18650 Scorpion left, SF 6P right
right: reversed
18650 as has been in my box, probably 3/4 charged.
CR123s unused, but stored for 1/2 a year now
PS: I still like the Led light better