If you look in the root templates you'll find something called Player_Light
Right click it, open it for edit, and on the sidebar set the intensity to 0. I'm not sure if that will get rid of ALL the light as that might depend on the atmosphere settings. But it should kill the light that emanates from players.
You'll probably have to save/reload the mod after that to see the change.
Last edited by SniperHF; 01/10/17 05:54 PM.