I have a jbj nano cube and it has two sets of lights in the hood (standard lighting). One went out, so I went and got a replacement today and put it in, but it didnt work. To check if it was that bulb, I put the new bulb into the other light socket and it worked. I checked the other bulb that was working on the other socket, and it didn't work either. Why could one of my sockets not be working? Anyone have any suggestions I could try. I really hope I do not have to buy a whole other hood; my tank is not even a year old.