They are, I believe "capless". They look a bit like the christmas tree bulbs! They have two little wires on show and you just twist the holder out, pull the bulb out, push the LED in and then twist it back into the hole. Think it took me about 45 mins to do the work. Removed the cover to the binnacle, pulled it forward and started changing the bulbs out. They recommend the complete removal of the binnacle, but i couldn't work out how to remove the speedo cable :roll: