I bought this video light, in order to use with an EOS 6D and a Sony HDR-PJ780VE camcorder. The light is incredibly bright, you can even use on the day, the dimmer works flawlessly (there are all LEDs dimmed and not single off) and the batteries should last a few hours without any problems if you do not need full light pipe. The holder for the hot shoe also makes a much better impression than expected, holding properly.