Re: H11 to H9 Conversion
To circle back to this, I wanted to post a follow up to the blue bulbs experiment.
I ordered a full set of "platinum" bulbs from headlightbulbs.com (that is H9s that I modified to fit h11 in the lows and fogs and 9005 for highs since they didn't offer a compatible higher wattage option). The headlightbulbs.com are the epitome of blue bulbs, but I chose them to mitigate costs in this experiment and because they offered matching colors with various bulb sizes. They replaced a set of modified H9 Phillips bulbs and AC Delco HIR1, which replaced the OEM h11 and 9005 before them. I ran them for about a week too let them break in and give them a fair shake in varying levels of darkness.
i can honestly say I feel that these modified blue bulbs were at least as bright as the oem h11 bulbs, and around 10-15% less than the modified Phillips h9 halogen. The 9005 high beams were clearly less bright than the oem halogens and I'd estimate 20% less than the modified HIR1s.
Once broken in, the color of the "platinum" bulbs appeared white with faint hues of yellow at varying angles when looking toward the projectors. The color difference obviously reduced visible light, especially in areas partially lit with street lights, compared to the standard halogens, and I had a similar gripe about the oem h11s.
There was no noticible difference in glare in any of the bulb combinations and the cutoff remained true and precise.
TLDR: I believe the higher wattage filtered bulbs can provide equivalent output to the lower rated oem halogens and are slightly less bright than unfiltered halogens of the same wattage. If color is your thing and you are comfortable with oem halogen projector output, it's not a bad trade off.