GenIII Halogen headlight bulbs

This question may have already been asked/answered before (so please excuse) - Does anyone know what type of headlight bulb Toyota uses in the 2, 3 and 4 models of the GenIII? I've read that they use a H11 (is this correct?) type halogen bulb rated at 55 watts, but I was also interested to know who makes it, and what the brightness and color spectrum is on the OEM bulb? I'm looking to replace with the Osram/Silverstar ULTRA, which claims 4100Kcolor temperature, and up to 50% brightness improvement when compared to standard, OEM halogen bulbs. Does anybody have any info, or experience with the ULTRA? Also looking at the Oshram Nightbreaker and Phillips Extreme Power (but have heard only rated at 350 hrs lifetime). Any advice would be appreciated. Thanks.