Luciferase Living Lamp

Who hasn't dreamt of an underwater life in Atlantis as king of the sea-monkeys, a beautiful mermaid as queen. Well probably lots of people, and that has little or nothing to do with this idea, so forget about it. This would be a little chemostatic culture of bioluminescent bacteria/algae/whatever. It would come as a kit, with spores, concentrated culture medium, and a three chamber plastic tank. A chamber at the top would have medium in it, and would drip slowly into the chamber below it, this would overflow into a third chamber the contents of which would be disposed of now and then, the drip rate would be adjusted so the culture stays at a more or less constant cell count. Such things exist of course, the novel part of the idea is selling it as a lamp. It should be enough to get a sort of dim glow. By the way one of the more well known bioluminescent enzymes is luciferase, hence the name.