Made the ostar aspheric (https://www.candlepowerforums.com/threads/184326) a while ago. I found a single Cree Q5 threw the same distance as the ostar w/ a smaller beam. I decided to make one so I could use a single rcr123a:
Threaded so can be attached to a camera mount
my beer cap battery capsule
some comparison shots w/ the ostar version:
Threaded so can be attached to a camera mount
my beer cap battery capsule
some comparison shots w/ the ostar version: