I need a way to illuminate this fake pumpkin.

10

I made this the other day. It's one of those fake, Styrofoam pumpkins.

I had a Dremel and too much time on my hands. It needs a little cleaning up, but it turned out way better than expected. I have two more that I have plans for as well.

The problem I have is lighting it up. I tossed a flashlight inside for the picture, but that isn't a good solution for an outdoor scenario. I can't put a candle in it and I would like it to turn on automatically (at dusk). I can't think of anything that would work, so I am asking you all for suggestions. What do you use to light up your jack-o'-lanterns?

Main requirements:
- It's gotta be bright, clear light (not warm white)
- I would prefer to be able to plug it into a regular 120V outlet so I can use my day/night outdoor timer.
- It should be weather-proof as much as possible

Also, if anyone has made some cool carvings, throw up some pictures.