With a guide number of 213', the SK400II-V Studio Flash Monolight from Godox replaces the original 150W halogen lamp model with a 10W LED modeling lamp that draws very little power with great brightness. This 5700K color temperature studio flash source features a 0.1 to 1.5 second recycling time with flash durations as short as 1/2000 sec. Additionally, power is variable from 1/16 to full power. Triggering options include sync cord, optical, test button, and wireless power control. The SK400II-V weighs only 4.4 lb and runs on 110 to 120 VAC mains power.