^^^^^^
I issue with them is that they are halogen lamps with an aftermarket HID kit fitted.
Anyone that has had one of those before will know that they take a second or two to warm up and reach full brightness. This may not seem like an issue as once they are on, they are on, and main beam works via a shutter to alter the beam, not a separate bulb. However when your lights are off and you flash main beams, you won't have instant full power as you would with OEM xenons, or halogens for that matter.
