Found this thread as I was searching for LEDs on here... slightly off topic, but worth noting the idea of swapping your dash bulbs for LEDs also. My 82 Land Rover Lightweight's dash lights were burnt out and instead of replacing with regular bulbs I ordered these
www.roverantics.com/Dash.htm.
Can't yet tell you how they look because I found out after removing the instrument panel that I also had to order a T10 Wedge Socket (bulb holder) because the LEDs are wedge shaped rather than having a traditional round base. These fit other Rovers I'm told, but not the my military one.
Took a long time to find anyone that carried the socket (found no one in the US) and instead got them for a few bucks on ebay from a seller in Hong Kong. Will wire those up and get the green LEDs installed as dash lights.
If you're looking for other colors, you can google T10 wedge and you'll get a bunch of sites (all seem to be in the UK or Far East) that sell the bulbs. Up to you know if they'll fit your dash, overhead light, etc.
Will post a pic when I get them installed...