Hi thank you for the replies. I think I will hold on from installing leds for now as it does seem like quite a bit of work.

Regarding the bulbs do you know if any 12 V 1.5 W bulb is fine and the pastic end can be removed and reused on a new bulb or do they have to be special bulbs with plastic ends (non removable)? The reason I'm asking is because I have a few normal 12V 1.5 W bulbs but I don't have the ones with plastic ends and would have to go and buy them...