I just noticed something fun. There's a hole in my window screen, which tomorrow I will fix. But tonight there is a procession of beetles coming in, one every half hour or so, attracted by the ceiling fan light. But they aren't just attracted by the light, but by its reflection in the fan blades.
I suppose the reflection, which flashes about 10 times per second, looks to their pitiful little bug brains to be a really exciting flashy light. It must be near a source for some beetle food, or a sexy beetle. It's sort of a beetle disco ball.
Unfortunately, the reflection also looks like it's on the ceiling, what with depth perception and mirrors and all that. So the bugs ignore the real light bulb, a perfectly usable 60-watt incandescent little number, and go for the reflection ... but they don't get there, as a fan blade knocks them to the floor, where I swat them like bugs, or squash them like bugs under the crushing force of my foam rubber Birken-nots.
Taken a step further, by shielding the real light and only showing the reflection, a nice fan-powered bug killing system could be devised.