good prices so I got three colours including white, red and blue. These arrived the next day and the only other thing required was some power which I could get from the supermarket!
The LED's all required 12v so I connected 2x6v lantern batteries in serial and the resulting current gives me a long-lasting light and makes the whole thing highly portable:
The white light is the brightest mostly due to being intended for headlamp replacement. But the red gives a nice spectral response with a hot orange center and a red trailing effect it seems.
I used some leftover speaker wire as the means by which to swing the LED about.
I tried ball-shaped spinning patterns over about 12 seconds and found it difficult to get a properly spherical effect, but the results were encouraging... then when thinking about other forms that could be created I hit on the 'time-tunnel' effect. By walking backwards away from the camera during the exposure and spinning the LED on it's speaker wire tether, I managed to open the portal to the next dimension!:
That's me in the centre in warp-form gauging whether to jump though or not!