I don't think they work well for a high beams only application. HIDs take a few seconds to come to full brightness when you turn them on, and they also don't like to be shut on and off repeatedly. If you can run your high beams for 5 minutes or more at a time, knock yourself out. If you're constantly switching between high and low because of traffic, I wouldn't recommend HIDs for just high beams, they won't live long.
'06 V-Strom 650 For Sale[/URL], light blue, Givi E36 sidecases, E52 topcase with Admore lights, Madstad, SW-Motech crashbars and skidplate