This little backup light packs a serious punch!
Together with a SAFT 14500 Li-Ion battery (included) it gives about 600 lumen for over 10 hours.
if you don´t have access to a Li-Ion battery a normal AA will fit and give about 150 lumen.
Not only is this an excellent light to always carry around, you don´t even have to carry it at all. There is an optional holder so you can fit it on your mask strap for hands free operation. Perfect for the photographer that just wants some work light.