I have been experimenting for the past week with LED Christmas lights and managed to get quite a few interesting shots. I started with simple, still shots such as the one below.
And then I built up to longer exposures with the LEDs moving in the background like this next one.
That shot was a four-second exposure to give the LED lights time to paint the background and then at the end of the exposure a small flash was popped to expose the subject. The same technique was used for this portrait.
The only subtle difference between the two exposures is that in the first shot the lights are hanging from a C-stand on one end and just before the exposure begins they are stretched away from the C-stand, raised up as high as they can go and then released. As you can see in the result they just paint diagonally across the background. In the second example, the chain of lights is being held by a person on either side of the background and they are raising and lowering the whole stand, somewhat in unison. The effect is more like a fountain, which I thought was pretty cool. I suppose there is no limit to the ways to move the lights with each one creating a unique effect.
Tonight, I went back to still life and shot a close-up shot of an eye, which was lit with only a handful of LED lights taped in place very close to the subject. Again, it produced a very interesting effect, catch lights and almost a make-up look on the face. Pretty neat.
Keep experimenting and keep shooting.