I have the level 2 quest called 'Path of the Sunsinger,' where you must defeat 50 enemies with your Radiance, grenade or melee attack. While kills using my grenade and melee are registering, kills while Radiance is active are not. I tried switching the Radiance perk around a bit, and also tried meleeing the enemies instead of shooting them while it was active. But I'm pretty sure neither of those are working, as the bounty is taking a long time to complete. Let me know if I'm doing something wrong or missing something. I'm on the PlayStation 3.