My apartment doesn't get the light I'd prefer, it's a main reason why I want to move but I can't right now. I'm interested in these UV and Full spectrum lights for daytime in the bird room. There's so much info but I think here is a great place to ask with so many experienced people! Are they a waste? Is one better than the other, ie full spectrum vs UV? (isn't UV part of the full light spectrum?) Will they negatively impact hormonal birds? Is there a certain amount that is beneficial but not overkill? The feather brite bulbs are on sale right now so it got me thinking!