The Radiant is a FAR Infrared (FIR) emitting globe. FIR transfers energy purely in the form of heat and is only absorbed by matter. This gives a more efficient form of heating which gets right into the tissue of an animal to give a more natural heating sensation, much like the heat you feel from the rays of the sun. Comes with silicon heat protection cover.  ES globe fitting, available in  75w and 100w.