H8 is your bulb size. In terms of lighting technology, the best you can get is Xenon HID. Use google to search for HID upgrade kits for motorcycles and have your dealer install them.
See example here (I clicked on the first hit in Google, but there are plently more out there):
http://www.omnixautosports.com/h8-hid-xenon-kit-p/ed-h8-hid-kit.htm
In terms of output, the lower the color temperature, the whiter the light. The higher the temperature, the bluer the light. 5000/6000K temps are your best bet. The difference is illustrated if you follow the link above.