I would design the “perfect edc”. Something like what CRX designed. Basically an Olight S1 Mini scaled up to take 18350 and Andruil.
Single LED with TIR. Emitter options would be Osram WF (maybe with a reflector) for the cool white thrower, Samsung LH351D “Dog Farts” for the neutral option, and Nichia 219b for the fans of rosy tints.
I would also make it very mod- friendly so that it could easily be updated when better components inevitably are released.
I’d design a flashlight optimized for normal people.
–21700 battery
-USB charging
-USB Power Bank
-Compact straight ‘tube’ format
Most Important:
-Simple High / Low interface based on Head tight / Head loose. Head Tight = ~1000lm x 2hrs; Head Loose = ~100lm x 20hrs.
Have runtimes and setting clearly marked on the bezel, so that someone with no instructions can figure it out.
High x 2hrs <———> Low x 20hrs
That would be the light I’d buy multiple of to give to friends and family.
Instead of a charging port a flashing port. Or at least micro USB / USB C port on the driver.
That might encourage numpties like me to get into flashing