Heyyy, sorry >.< I hardly ever get on here anymore! Sadly...
But the portal gun was a project I kind of gave up on a looong time ago.
I got most of it done, but I just stopped...idk why
The light I used was actually free. It was an LED flashlight my old job gave out and I glued it to a round cardboard piece then put that round piece in a long straight glass jar that made up the light on the gun (:
Hope that helped!
So sorry for the last response!