The rotolight professional hd led ringlight uses the latest generation of leds with an output equivalent to 80w 25 brighter than the previous version the lightweight and portable rotolight rl 48 ringlight is ideal for video cinematography and dslr photography and video powered by 3 aa batteries not included the ringlight can run for up to 4 hours providing a widely dispersed evenly balanced illumination with soft diffused shadows ideal for close up portraiture product shots and macro