Making the white LED red might be a bit of a challenge but I bought some red acetate and some red tissue paper and this should make a handy sketching aid, particularly as there's no annoying 'bullseye' effect which you do get with some lights. It's also incredibly lightweight which is a big plus because you don't want a heavy object hanging from your sketchbook! However, as it is rather too lightweight, I hope it lasts, especially as it cost a rather extortionate Â£9.99 ($16.65).
I am looking forward to giving this thing a go, in the next clear night once the Moon is out of the way again.
Here's a pic of it clamped to my sketchbook: