I had a bulb on my car break at the base of it, I couldnt replace it at the time because they dont sell them at the auto store, they are the HID lights, basically a small metal halide, so I glued the base of it and has worked ever since and that was a year ago, and they cost as much as our halides for the aquarium. The glass itself is a shield protecting the inner bulb. But.... I wouldn't recommend gluing your bulbs though