It's a simple GM to Player feed issue.
Essentially I can set a token to be a light source like any other object just fine, but if I change the radius of the light it doesn't reflect that change in any way in the player's view. I've tried moving the token around, turning the light source on and off and making multiple tokens of which all react the same exact way.
The issue is only with tokens, all other light sources change just fine, but if I want a goblin holding a dim torch, it still lights up 7 squares around him no matter if I set it to 4, 3 or even 1. The changes reflect just fine in my editor, it's only player views that do not see the change.