Steve, sorry can't be much help there as I bought half of a two burner pack from one of the members on here,fitted it and threw the packing.
What I can say is it's very bright,a great improvement over standard and shows up the standard main beams as two small orange puddles.
Another advantage of the 'classic' shape Mk 1's is the fact you have 3 separate bulbs so having this dipped HID on all the time is actually giving the charging system an easier time as well due to it drawing less juice than the original bulb.