-
I wish there was still multi quote, this was going to be a reply to hippies three led race woes...
Take one of these with a red gel over it:
http://www.ebay.co.uk/itm/370890544830
-
Really bad idea, getting broad spectrum light from an LED then throwing big chunks of it away...
Might as well de-solder the LEDs and fit ones which only emit red light, but for the impossibility of hand-soldering parts into a device designed for SMD components and reflow soldering...
Glue three single-LED red ones together and claim them to be a single unit.
That option crossed my mind and has the advantage of redundancy but I thought I'd investigate nice 3-LED options first.