Club 80-90 Forums

I think the round ones are all H4 bulbs...

However, if you are ater improving the output from the bulbs, the 1st port of call should probably be upgrading the existing headlight wiring - then adding newer bulbs...

http://www.keithandsylvia.co.uk/tech%20 ... pgrade.htm

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The early ones were not Halogen, I changed mine over, bought them off someone on here, cant remember who, but you used to be able to get conversion bulbs that were halogen h4 with the old style cap as the old none halogen bulbs. But as 101 says, improve the wiring and maybe as much as 30-40% extra light is available (must do mine one day)