Recently we had a post about this and I sent pics to a few on the PB forum. My contraption is solar powered, it has a 12 volt light, and a 12 volt fan on the bottom. The bugs fly into the light, and get blown down into the water. The rig runs on a controller that kicks on as dusk, runs for 4-5 hours, then shuts down for the next day. It doesn't cost me anything to run, and the only component that will go out over the next 5 - 10 years is the light bulb. I bought all the stuff off e-bay (except the battery) for the price of 2 bags of fish food.
Seeing that first bug getting inhaled, makes it all worth while
