Hello. I am currently running a 20w 12v mr11 powered by a 3s 11.1v lipo but if i was to get a 6v 10w mr11 and run it off a 2s 7.4v lipo, would it be brighter. This is for my cycle light so have some size/weight constraints. The 3s lipo 2200mah is as big as I can get in the pouch, thank you.