Hi Demonx. Like probably everyone else, I too would like to have better illumination in guages. (particularly the speedo so I don't get booked). From investigations so far, I believe the bulb type in my '75, and probably a lot of other models, is a BA9S. The BA being for bayonet, the 9 being the diameter of the base of the globe in mm, the S for single contact. The are quite a few LEDs on The Bay for BA9S replacement. If the US contact doesn't work out, there may be some other options. I'll continue to suss this out.