I took this photo at a recent BBQ. I was using the "fireworks" setting on the camera, which is the closest thing to taking a long exposure photo. It gives you 2 seconds of exposure. The only light source was two mosquito candles on the ground, and I then amped up the brightness, contrast and colour saturation.
Looks like a scene from a vampire movie.
By the way, the candles seem to attract mosquitos, rather than deter them. I sat outside reading Frank Chalk's book tonight and was only able to swallow a dozen pages before the biteys moved in.
(God, I hope I got the apostrophe in the right place).