My lego flashlight

This is my lego flashlight collection. My idea is a dual fuel 14500 AA flashlight that can switch to many other heads. Up to now:
– 1 head with high performance, led sfn43
– 1 head for throw, led osram
– 1 head for 1 mode only
– 1 head for 3 modes
– 1 head for triple leds (ts10)
I would like to receive your idea for the next heads, please.

by Candid-End9205