At this point, most of us are probably pretty familiar with the gel fixes for fluorescent and tungsten ambient light situations. And for the trickier sources, you can check Rosco's free FIlter Facts booklet to learn what filter combinations can be used to balance lights such as sodium- or mercury vapor, etc.
But what about really weird, non-standard lighting environments, like a high school gym with sodium vapors and a brightly colored wall affecting the overall ambient color?
There's a gel kit for that, too. Read more »