Red Head Lights
Red Head is a term used to describe general-purpose lights common in visual media work. Power rating is around 650-1000w, typically 800w.
Red heads can be used as a key flood light for large areas, but are also useful as fill and backlights.
The example pictured here is an Arrilite 800w open-face focusing tungsten floodlight. The beam is focused using the yellow control at the back — this adjusts the reflector rather than the lamp, which should give the lamp a longer life because it is not being moved.
Note: The term "redhead" is often used loosely — there is no rigid definition.