I’ve been looking for switchback bulbs for my 2018 Ford F-150 for awhile now. Tried two others and they just didn’t work properly. These have the whole package! They fit into the bulb sockets securely, look awesome which is important since you will see the reflection of the bulbs in the headlights. Their brightness is just enough, actually happen to be really nice and bright when lights are on at night. When on DRL, they are a little dimmer which I like, and when you turn signal or hazards on they immediately switch from white to amber without having a mix of the two colors, or delay. I was able to go into FORScan and change the code for rapid flashing (bulb burn out) feature so I didn’t have to install any load resistors which was great. I don’t have any flickering, or delaying in the brightness. There just all around an amazing bulb!! And compared to some other top branded switchbacks, these were actually reasonably priced! Don’t hesitate to buy these, just buy them! If you know and have access to FORScan software, I would change the code to to prevent rapid flashing and not have to install load resistors. Must buy!!!