Thanks. The RS catalogue (including the CD version) is so difficult to navigate nowadays that I must've missed that!
Six amp stuff is entirely adequate to hang, say, a 60W bulb on the end :-)
I once did rewire a couple of "picture lamps" with some RS PTFE-insulated VERY thin equipment wire, but for some reason it seemed too fragile, although they're still working...
Obviously, for this sort of purpose, any colour insulation would do.