When using Nothing Manacles combined with explosive light I have noticed that elemental wells that do not match your subclass will not apply at all to your second grenade while Void wells will. I don't know if this applies to other exotics that provide a second charge of things. Also, is it a bug that explosive light wells do not proc from a regular grenade launcher? I'm guessing a grenade is not coded the same as an "explosion" or something? Kinda weird if it's intentional.