The YN600L II Pro Daylight LED Light is one in a series of on-camera LED lights from Yongnuo. The light has 600 LEDs that you can dim from 100-0% - either on the fixture or with the included 2.4 GHz wireless remote. A fan dissipates heat to allow the LEDs 50,000 hours of use. The light can be stand-mounted or handheld with the included handle. The YN600L II will run on a separately purchased AC adapter or two user-supplied NP-F batteries.