Shines brightly, but ..

.... Why this product is now available absolutely for Action cameras is a mystery to me. My GoPro Hero, on which is explicitly mentioned in the article description, has no connectivity with the device. What remains therefore is the variant to attach the video light on a tripod, but that naturally restricts the freedom of movement (on the helmet or something, of course, is also possible).

Nevertheless, I am satisfied with the luminous efficacy. We have had in Denmark a bunker tour and the light intensity is sufficient to fully illuminate small spaces and also to take pictures.

Therefore, the small light is quite flexible and easy to use as a camping lamp or the like. The unit itself is very light, only the four batteries contribute to weight in. Max. Four lamps can be joined together, but it's also an expensive affair.
Who has in his recordings from AC power, of course, with a large halogen spotlights better served, but who wants to be on the move flexibly or just like to lead something like flashlight with him, is operated very well with the easy part. A small integrated mini tripod would be an idea for a product improvement.