Very rough guess, but if I were to approach this I would draw them dynamically with the canvas plugin. To get the points/angles in the beam use a sine function and transform the resulting points to add irregularity. If it's animated, you could use a noise function from the advanced random plugin to keep it smooth and not just spaz out randomly.
Layer two or three of these on top of each other, and add a fourth that's for the background glow and lighting.
The width of the beam at any given point or section could use another noise function to vary it.