Amazon offers the Philips H1 CrystalVision Ultra Upgrade Headlight Bulb 2-Pack for $21.02 $24.75. Clip the 20% off coupon on the product page to cut the price to $16.82 $19.80. Plus, Prime members receive free shipping. That's the lowest price we could find by $12. These DOT-compliant lights feature 4,000K bright white light.