Back to the Philips ecovision. Aparantly 60/55w is not always 60/55w.
I found a swedish test of different headlight bulbs, and in particular the philips ecovision, they tested on a Honda jazz and measured the wattage used at 12v and 13,2v.
The ecovision used 51,2/53,8 which was the lowest of all the tested bulbs.
Other results:
Philips blueVision: 53,4/61,4
Philips Vision Plus: 53,0/61,2
GE Megalight plus 60%: 53,0/60,8
GE standard: 57,6/66,9
Mega Blue: 57,7/66,9
Stanley LL: 56,4/65,2 (These were the original lamps of the tested Honda)
Osram Bilux: 55/64
Osram Nightbreaker: 58,8/68,1
Biltema standard: 57,0/65,6
you can read the rest of the rest of the test here :
Google Translate
Switching to Ecovisions from standard bulbs, will save you 10,4w on lowbeam (5,2x2) and 22,8w on highbeam (11,4x2), not a lot, but ecovisions outperform the standard bulb in other areas too, such as scope and width.