here is another one, still trying to find the narrowest led\lens combo.
this one has 4 xpg2 38mm ledil iris 4*. lenses are made for xpg\e\c, not xpg2, (it has different angle and primary optics), so it might not be 4* in real world, the beam looks narrow in smoke, but how it will perform in real world idk yet, will test it soon.
so this one is bigger than previous one, imo too big, and on heavy side to 1,7kg. not as big and heavy as some halogen searchlights, however.
it uses hyperboost driver, set to 1,5A i tried 50k recomended pot, but its range is very limited, basicly only in the middle it drops from high to low. table in the driver datasheet shows resistor values, and it does not go above 20k, i'll try 20k pot later, when i get one.
uses 6 tenergy 18650 2600mah, 3s2p. wired to be charged with hobby balance charger, each cell is protected. i used mic 4 pin plug as charging plug, radio shack sells them for $5 each , male and female.
just as previos one, it uses gitd tape (fire exit sign) inside lens holders.