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Interesting..but it doesn't state what kind of LEDs, beam spread degree, color temp, lumens/brightness (i guess watts), etc.
This little thing seems much tougher built, higher quality, SMD/Cree Led, 4200k, brighter (343 lumens or 23 tungsten watts), cheaper in price and also fits in your pocket:
Just strap one on a mic-hotshoe-mount on top of your camera, or handhold it or mount it somewhere for an off camera light source.
Or..the Cineroid LED panels look much nicer and better quality for a similar price as that cheapy-brand Promaster light.