The Osram Silverstars and the Philips Weather Vision from Jim at
http://suvlights.tripod.com/suvlightscom/ have both lasted and lasted and are visible superior.
I wonder if bulbs that failed early were installed dirty or were underpowered, or if some shops sell seconds or mishandle their inventoty?
I think that the Osram Silverstars and the Philips Weather Vision are not as good as more radical upgrades, but are still a very acceptable OEM upgrade.
The next step is a better harness with its own battery direct fused power supply and relays triggered by the factory circuits to improve voltage and current flow to the bulbs and reduce current flow through the factory harness.
Next mods to different model bulbs or high wattage bulbs which can melt stuff and probably will fail much sooner.
After that comes HID lighting.
I've been happy with Osram SilverStar or Philips Weather Vision from Suvlights.
[quote:6b08d22a8a=" "]I think I first read it somewhere here. I'm too frustrated with search to bother, but here are the figures from the sister companies' respective sites:
The Sylvania SilverStar 9003, our bulb style, is listed as (High/Low-beam) 1500/910 lumens.
http://www.sylvania.com/auto/silverstar.htm
The Osram SilverStar H4, same as 9003, is listed as 1700/1075 lm.
http://www.osram.com/pdf/service_corner/110PPSilverstar2E.pdf
Couldn't find an HTML page with the info.
Oh yeah, this site has respective percentages of brightness ratings:
http://suvlights.tripod.com/suvlightscom/html/halogen-h4-9003-hb2.htm
And this addresses the Osram/Sylvania relationship:
http://suvlights.tripod.com/suvlightscom/html/faq-qa.htm#3
The Sylvania's are listed as 4000K whiteness, while the Osram's do not list that figure. The last site says they are "slightly whiter" than a standard halogen bulb.[/quote:6b08d22a8a]