If the gp stands for gas processor,I take it you meen the air gas processor.That unit wasn't open to see the leds.As for the tubes in the cell,there are pictures of his cell,but I didn't see that type of cell when I visited Stans buggy.It was set up with the injectors and not a gas type cell.The picture I'm talking about shows the tubes mounted in a base with a plug in the top of the tubes to hold them apart.In the same picture,it shows a bunch of leds and some colored lenses.There are also another picyure that shows three units mounted on top of each other,plus the hydrogen gas gun.Those are the cells.