This extension is designed for Fantasy Grounds Unity only, and is based entirely on CoreRPG. So it should work in all CoreRPG based rulesets.

This extension allows the DM to easily toggle on/off any light source that is created as an Effect on a token in the Combat Tracker. This extension will not affect lights placed using the image lighting menu. One or more tokens can be selected, and toggle their light effects. The effect is not removed or deleted from the combat tracker, instead, it is set to disabled.

Youtube Intro