It just dawned on me.
Are you using an after market Colored bulb?
Also some of those "Brightest" bulbs don't actually obtain there higher lumen output through science they mearly bump the Wattage.
Brighter yes but they burn out very quick.
If you answer yes to either of these qiestions you need to switch either to a quality HID or Sylvania Silverstar Halogins. I have 4 extra I could give to you at a good price.
Mike