Great! This ray is pointing at something.

How did you accomplish this effect author...?Is it a camera filter or a technique...?

I think it is shooting with the zoom, then it is not a rays, just a trails of the lights.

agreed.......

will wavelength (=color) shift by zooming? uh oh, physics… maybe sort of a lensbaby kind of prism?

. This shows the spectrum of light rays in colour.

Well, I agree about the color change, but light rays, that repeat the shape of the light bulb?!

this is a lens flare, not a light ray!

I agree.