The Metz 60 CT4 has full, 1/2,1/4,1/8/and 1/16 power on manual , but for indoor and studio work studio flash (strobe) I find is a much better option the output on some can be adjusted in 1/10 of a stop increments that also adjusts the modeling lights in proportion and to buy a four head outfit for around the same price as four 60 CT4 either mono-blocks or battery powered units.