I ended up with a simple and effective DYI solution.
I got one of those Photon keychain lights. It has a red led, covert nose AND dimming. It comes with a small clip harness that I just clipped to a thin elastic hair band. I now have a micro headlamp.
I won’t be able to find anything lighter with the focused, dimmable beam. It’s perfect!
Photon Light FMRC Photon Freedom LED Keychain Micro-Light with Covert Nose, Red Beam https://www.amazon.com/dp/B000IXGBJI/ref=cm_sw_r_cp_taa_8cZIDb2TDECE4