Thankfully it did not fall into the aquarium, it rested on the cover that is around it. But the swirly thing inside the hood that you screw the light into has come off and was still on the end of the light bulb. I was thinking of returning the hood to see if I could get a new one, but it came with the aquarium (mini bow 2.5) and I certainly do not want to redo Thai's tank. I don't know if they would do this either. Does anyone know if it would be safe to glue it back? And what kind of glue would I use? That wouldn't just come off from the heat. Thank you!Oh, and this is the first time it happen, I am using a new 10 watt fluorescent light bulb for small tanks. The one it came with was an incandescent, but I don't use it.