Hi Lt. Fubar,
when consindering to build your device, I suggest you to contact
LED LENSER - Professionelle, fokussierbare LED-Taschenlampen von Zweibrueder Optoelectronics
for the LED-part.
Nowadays the LEDs produced by them are brighter than the bulbs from tactical torches....
Got i.e. the T7 torch which has a laserwarning on it - so smal but so bright that you throw your other torches away!
Zweibrueder has a development department, which is always interested in new ideas.
Greetings Flying Bull