Sacto...I'm with you. It's confusing ! I have the P45T hella sockets. The H4 Led's I ordered from Superbright LED.com did not fit in any way. They looked exactly like the one you posted from Amazon with the three tabs around the base. My current halogen bulbs do not look like that. I have talked to guys at Superbright and they know nothing. I think there is a euro adaptor that will work but they are something like $30 USD and available in Europe So...I'm in the same boat as you....Bruce