55W Xenon HID Headlight Conversion Kit H1 H4 H7 H8 H9 H11 9005 9006 6000K/8000K. 55W H7 Car HID Xenon Headlight Conversion Kit Bulbs Ballasts Replace Halogen UK. All xenon bulbs should use with the ballast, and we suggest 55W bulbs should use with 55W ballast, that could make the bulbs live longer !
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