lights.rad is a text file that can be used to define
textures as
texture lights. This file should be placed alongside your compile tools.
Each line of the file defines a texture, in the form "texturename #R #G #B #brightness", where "texturename" is the name of the texture, "#R #G #B" is the color of the light in RGB format, and "#brightness" is the brightness value of the light. (Example:
genericlight 255 255 255 1000)