To answer this inquiry, I had originally changed out all four of my headlights, making both low beams and high beams into HID lights. After a coast to coast ride, and experiencing the start-up time of the high beams, I decided to eliminate the HID high beams, and went with PIAA Super White bulbs in the high beams.
The problem was that the HID high beams just took too long to come up to full illiumination...even if that is 5 seconds...when you need a high beam instantaneously.