I've just been looking for 12v 3w capless bulbs as the Haynes manual states for the instrument warning lights. I found a place in France £12 ea so kept on looking and but I keep coming up with 12v 2.3w bulbs now I know the alternator warning light is used to initiate the charging system so I just wanted to find out what others have used. The only reason I want to change them is due to the difficulty getting to them and I have the instrument assembly apart at the moment.