Review on ULANZI VL49 RGB LED Light: Compact Rechargeable Camera/Camcorder Light with 2500k-9000k Color Range for Youtuber Livestreaming - Magnet Design, Pocket Size 2000mAh, RGB Color by Matthew Kocur

What I liked most was the ability to choose any color in the visible spectrum for the lighting. Second, I liked the ability to choose the color I wanted via either RGB or Kelvin temperature. Third, I liked the ability to control the lighting by percentage. As far as brightness is concerned, no, such a light is of course not as bright as a system flash. However, this adds ambient light in studio settings. It can also be the main light source for macro photography. The purchase was definitely worth it and was recommended for purchase. Battery life obviously depends on the brightness level used, according to basic physics. The brighter you use it, the less time it glows. This is completely sufficient for all of the applications mentioned above.