Pay attention: Please never install D4S D4R led bulbs to D2S D2R ballasts, and never install D2S D2R led bulbs to D4S D4R HID ballasts, it will cause HID ballast burnt out. D2/D2S/D2R ≠ D4/D4S/D4R▶10 minutes directly install to the ORIGINAL BALLAST to replace HID headlight bulb.No need to take off the original ballast.(Please make sure the function of the ballasts are working)▶100% super decoding error-free.▶Outstanding brightness with CPS4575 super bright led chips provides wider and farther lighting vision which greatly enhances your safety when driving at night. Each bulb power is stable at 45W once light up, and the visual brightness total reach about 15000LM▶Super Aviation aluminum shell with 12,000RPM cooling fan more effective heat dissipation than fan-less HID bulb,50,000 hours long lifespan, 10 times than normal HID bulb.