The brightness of the Lume cube is incredible. I purchased a few of these as a portable continuous light source when recording video. The work great and the batter has lasted me for at least an hour. In addition to being used as a continuous light one can use the Lume cube app for taking photographs which will cause these to flash as the picture is being taken.
The unit is operated by two buttons on the top. When using it as a continuous light a single press on the left button (orientated such that it is facing away from you ) will turn it on at its minimum b