The professional Falcon Eyes Studio Flash TF-900A has a light output of 900 Ws and a modeling lamp with 250 watt power. The TF-A series of Falcon Eyes flash strobes are extended for the demanding studio photographer. The flash units offer everything you would expect from a professional flash, like a quick recharge time, rugged metal housing, professional bayonet connection for accessories, a built-in slave receiver, Cooling fan and precise adjustability. Of course, the modeling lamp can be turned of or on. It can also automatically be set to proportional the light output.