The Nikon Creative Lighting System is built around the incredible capabilities of Nikon Speedlights, and if you've seen flash wizard Joe McNally's advanced lighting videos (if not, check out the links at the bottom of the page), what you've undoubtedly realized is that Joe's flash techniques, methods and experiments are built on his ability to use flash to express his ideas and create a mood with light.

In one of the videos you hear Joe talk about warming up his subject. What he's referring to is the color temperature of the flash unit's light, and it's a key element in flash photography.

A light's