I wanted another mini hand warmer that takes 10440s without damaging the little boost driver. Put a 21C 4k in a copper tool (thanks for the suggestions)
As expected it all works great from mtnelectronics, and fits nicely.
Nicha 219C 4000k on 10mm copper sinkpad
11mm FET with guppydrv
A lot thicker
ISO 50 - S 1/60
forgot the mode, I think medium
max (the low iso is not doing justice, its brighter than those knock-off xmls)
Nice job, the tools are nice lights when modded! Copper should spread the heat nicely I suppose.
If you sand down the front of the tube, you can screw the head down to the O ring. Don’t take of too much, or the elec. connection to the tube can become an issue.
Or you can sand down the sinkpad a little.