Q: The volume is so small, will the heat dissipation is very poor? A: Please do not worry, LIGHTENING DARK new upgraded H7 led bulb is built-in cooling fan. All-aluminum lamp body with cooling fan, fast and stable heat dissipation. Q: Do I need to buy additional installation clips? A: No additional adaptor clip is required. Adaptor clip has been updated for 99.9% of H7 light bulb car assemblies. Q: Why there is the flicker/error message/radio interference after installing the bulb? A: Some vehicles’ systems are sensitive to the led bulbs, we will send you decoders/resistors to fix the issue. Q: Will these fit on my vehicles? A: To confirm the size in your original user manual or by checking the original bulb's back.