Cool project, nice job.A suggestion for further refinement:1. Get a small pre-wired flouro batten from an electrical supplier (or get a qualified mate to wire one up for you).2. Grab a couple of "daylight" UV tubes from an aquarium shop.3. Make up a housing from something, black acrylic maybe, fit batten to housing.4. Add UV sensitive decoration (sleeving, fish, etc.) to PC and fish tank.5. Fit housing to top of tank... cleans up appearance, is good for fish and plants, looks funky.