If you haven’t got a stage, or a big studio space, or a dancer with room to move, you can do a pretty cool write-with-light photo using all the tools and techniques I just described, but just eliminating the super-long exposure and your subject traversing your frame for about 15 feet or so. You can do it with your subject barely moving at all.
I tried this with a martial artist, as an example.
The weapons are important. If they’re being used, attach the LED lights to those implements of death, as you see here.
Set up the lights just the way they were in the dancer photo, right and left, just off frame. (But obviously closer together. We are now talking about working in a small space.) The lights ...