The SK400II-V Studio Strobe with LED Modeling Lamp from Godox features a guide number of 213'. It replaces the previous model with a 150W halogen screw with a 10W LED modeling lamp that consumes very little power and provides high brightness. This studio flash light source with a color temperature of 5700K offers a recycling time from 0.1 to 1.5 seconds with a flash duration as short as 1/2000 sec. Additionally, the power is variable from 1/16 to full power. Activation options include sync cable, optical trigger, test button, and wireless power control. The SK400II-V weighs only 4.4 lb and operates on 110 to 120 VAC electrical power.