This is a LED
type bulb. Aqueon has enclosed a LED
light strip inside of a glass tubing for protection if I am correct. The "bulb" has a plug that attaches to a transformer located in the hood unit. You can add up to 3 LED
bulbs. It's a neat system and the simulated night lighting is pretty cool. Just can't put that on a timer since it requires you to manual switch between the two types of lighting. Then there is a lack of places where you can get the additional bulbs as well. There is a YOUTUBE video of person that did a review on the light system but there isn't much more information out there on this particular light. I guess I could use a LED
strip enclosed in a small plastic tube to hold it in place within the hood. Just have to ensure the plug and voltages are compatable with the transformer unit.