The Light Storm LS C300d LED Light from Aputure is a Chip on Board (COB) designed fixture with a 5500K color temperature that consumes only 300W of power while outputting 4451 fc of light with a standard reflector at a distance of 1.6'. In addition to power efficiency, this fixture also has a CRI rating of 95 and a TLCI rating of 96, indicating an accurate rendering of color. And the LS C300d can be seen but not heard which is ideal for sound sensitive environments. The intelligent cooling system employs temperature sensitive fans to regulate the heat. Even at maximum power the fan is undetectable by most people.