Hi - I just changed to a scubalamp P53 following a review on another wetpixel forum. It also has a strobe mode which may be useful for some. They are not cheap, but the quality is very good.
I found mine at - https://underwater.c...robe-light.html
There are two things that I would change:
- an attachment point for a lanyard
- simple off - need to cycle through 5 modes to turn off.
All the best