Yes, all of our GP thunder and X5 Lightning HID kits with build in cancelor, when we convert the OEM bulbs to HID kits, the voltage drop
from the stock 55 watt halogen bulbs to 35 watt. Therefore, sometime one light will not come on or both on off with flickering affect.

Therefore most of our kit with build in Cancellor to stablize the kit without wire directly to the battery with an extra cable.

Therefore our kit is more quality controls then other kits are selling.

thank you!