All of what's been said is either true or posible, but, I have been using an HID bulb from about two years and wouldn't consider returning to the original bulb and would only use the sealed beam option if it were an economic solution or an HID were not available. I had all but given up night riding with the original bulb and would never consider using the low beam - regardless if I'd been flashed at by every oncoming car. My only objection to the HID I have is that the 'whiteness' of the bulb is nearly invisible - particularly when on high beam. The bulb I use is an H4 8500K Xenon - Krypton. I got the bulb I have from New Speedmaster (Brent). It was reasonably priced. I got it in near lightning speed. If you experience problems with HID bulbs. The problem may be the number you use, either by preference or your predomenent riding conditions - Example: The intense blue of the 8500 temp./heat rating may make riding in rain and fog very difficult due to the glare from the blue/white light. You may opt to look for a 4300K. The light will be less intense, but will project less far. What I've read indicates that the optimum, all-around range is 4000 - 5000K range, which compares to daylight.
