The 4K Fresnel uses an 4000-watt HMI arc lamp and a large Fresnel lens to produce a focusable daylight-balanced beam around 5600K. The Fresnel gives you smooth flood-to-spot control and the ability to make clean cuts with barn doors.
The 4K fresnel excels when you need:
Sunlight through windows
Daylight on sound stages
Lighting large diffusion frames
Simulating daylight at night ("daylight moonlight" setups)