Mike Lights, Inc. 

Lighting Basics

From these pages you´ll find information about stage lighting.  Included are pages on how to set up lights, accessories, and lighting equipment.  It's extremely important to realize how they work, and what you can do with them.  A Lee color filter table is also included for your use. This table includes the whole color effect range and color temperature correction range including Rosco equivalents.  From here you can find out how to mix Lee colors to make white light.
The Visible Spectrum  Spectral Energy Distribution 
Color Temperature  Color 
Color Mixing  Gels and Uses