UI lighting in Far Cry 6 was quite challenging. All elements in UI are always loaded in Game - budgets for lighting was very limited. There were also other limitation where I couldn't really see what the lighting would look like unless I submit my changes and wait for another build come out either the next day or two. :) The sizes of UI elements were all different and positioned differently in front of UI Camera - so I needed to make sure the lights I place would cover the whole elements, too.