The switch you've bought is not designed for lighting use, it's for heavy current devices, such as washing machines powered from the ring-main. It's very difficult to do what you want to do, as neons need a neutral wire and most lighting switches don't have one at the switch end. I understand your problem as I've thought about doing the same thing with a loft light with a switch on the landing. If someone on here comes up with a solution I'll be cribbing it.