From the manufacturer
Philips CrystalVision Ultra Upgrade Headlight Bulb
Philips CrystalVision ultra headlights rival the look of HID thanks to the blue coating on the glass and the blue cap bulb which creates a bright white light effect in the headlamp’s reflector in daytime.
Headlight bulbs put out less light as they age. That means that old bulb is giving you less nighttime visibility that you would have with 2 new bulbs.
CrystalVision ultra upgrade headlights enhance the style of your vehicle while offering improved performance compared to standard bulbs.
With CrystalVision ultra upgrade headlight bulbs, drivers enjoy a look that is unmatched and a DOT compliant bulb.