After ordering this pack of bulbs one slammed on the second use after having had a commercial gesture here I am again with 4 bulbs h7 6500k none of them light up the same one yellow the other blue and the other one few of the 2 and more a burning smell that escapes from my headlights I advise against occurs. Edit SAV => I invite you to contact us for the replacement, there may be an odor at the beginning because of the different layers applied on the glass of the bulb. 6 month warranty on our HODs