nao, a diferenca entre elas e a temperatura de cor e os lumens.
pelo que tenho andado a ler a de 4300K tem mais lumens mas eu acho as de 5000K melhores, sao o branco puro sem qualquer reflexo azulado das 6000K...
It depends on what you meam by "sacrificing too much light output?"
For one person 300-500 Lumens might be low loss, while for others too much. Generally speaking (based on Philips datasheets) and avg. 4100-4300K bulb (85122) can produce 3100-3400 Lumens, while a 4800K (85122CM) goes down to 2800 Lumens and 5800K (85122WX - Ultinon) goes down to 2400 Lumens. I can assure you that there is a noticeable difference in the output between these bulbs.
If you plan to go at 5000K try an OEM solution (like 85122CM or Osram Cold Blue etc.). You WILL LOSE Lumens, but still you will keep the major quality characteristics of the OEM bulbs. If you chose ANY a/m bulb higher than 4300K you'll be having a blue tinted output (even with 5000K bulbs), plus all the minuses from the lower quality of the bulb (compared to any OEM one). This is based on my personal experience.
IMO it's not worth sacrificing Lumens for Looks !... My 85122+s (after 30-40 hours of operation) have lost their original (extreme) yellowish tint (on the road) and have become (IMO) true (and very intense) white (with a bit of bluish tint - according to the road and the items they "hit" each time). Definatelly they're "blue" compared to standard halogen headlights.
The choice is yours...
