Amazon offers Prime members the Philips H1 CrystalVision Ultra Upgrade Headlight Bulb 2-Pack for $23.72 $25.28. Clip the $5 off coupon on the product page to cut that to $18.72 $20.28. With free shipping, that's a buck under our August mention and the lowest price we've seen. (It's the best today by $11.) These DOT-compliant lights feature 4,000K bright white Xenon-type light.