About the same size as this light, but i hope slightly more lumens
http://www.canadiantire.ca/en/pdp/mastercraft-titan-high-intensity-flashlight-0653057p.html#.VJE88Hu1_LU
Now that look like the police brutality special from the old days. Unless you are a slag from Alien Nation movie and just rip the head of of it. 
You could use the tube of this for a 26650 or 32650 project?
If you can’t see a reflection from the moon is it really all that powerful?
Its about 3 feet long and takes 6D batteries (i think), and has a single XP-G (not XP-G2) chip
If I lived in Canookistan, I’d buy one.
Your the next state over 