That's what I used to do with feh too.. but then every one around him were shining beacons of searing the eyes to a crisp lights. So after a while I just gave up lol
Because being in a party where nearly everyone has glowing equipment makes the dark and low light vision useless.
Yup, and that's a Bioware thing. It may be possible to override, but the payoff would have to be worth the effort put in to make the changes, and the lighting issue is generally minor.
Darkvision and low-light vision work by increasing the distance someone can see in a dark environment. Low-light vision doubles the distance a character can see in low-light conditions (example a human carrying a torch can see 20ft in every direction clearly and would need to make a spot check for anything beyond that, an elf carrying a torch can see 40ft in every direction clearly.) Darkvision allows a character to see up to 60ft in low-light and total darkness and is unaffected by light sources. So if the game can be moded to do this having a light source wouldn't negate these abilities.