Hot lights are tungsten incandescent bulbs in a housing usually with a reflector. The following is an illustration of one of the hot lights found in the UD/Art Lighting Studio.

What's a hot light?

a powerful light used in television production.

Is warm light good for photography?

2700-3000K is a soft warm light and suitable if you would like a healthy glow for photography and not make up application. 3500K-4100K is a neutral white light and its good for photography. 4800K-5000K is recommended for make up application and photography as it is not too warm or too cool.