Probably not immediatly, but light exposure over time will degrade the amino-acids or alter them chemically. Its specifically the UV that will effect them the most.
If you are storing it in a fridge, I doubt there will be any issues from opening and closing the fridge. A little bit of exposure shouldn't mess with it too much, but over time im sure something will degrade... good rule of thumb since it also needs to be refrigerated, just pour a few days worth in the dosing container, and top it off when it gets low.