There is pros and cons with anything people do. I am a pro for doing anything to make your motorcycle more visible and quite frankly hate the stock light output, I feel like its minimal. Hence the reason I do barely any night riding. I also live in a country setting which may have a lot to do with my opinions on the output..there is like barely any street lamps around my area until you travel 20 minutes into town. Just woods, and more woods....occasional a stray animal or deer.
With HIDs there's no comparison. 3200 lumens is the output of a single HID bulb (factory 4300K color temps, not these 10K crap you see ricers using). The only halogen for vehicle use to come close to that is the H9 at 2200-2500 lumens. That being said most manufacturer's only use them in high beams.
Pro: Greater Brilliance with Less Energy
HID bulbs provide greater illumination at much less cost in energy than incandescent bulbs. They release more radiation as visible light instead of heat. They also provide greater illumination than other low-energy lights like fluorescent light bulbs. As a result, they have often been used for large open areas, like stadiums.
Pro: Clearest Lighting for Driving
HID lights not only provide more light than other light bulbs, but also emit light toward the blue-white end of the spectrum, which is more easily seen by night time drivers. They light up the area ahead of a car more clearly than conventional lights.
Con: Less Natural Fade
HID lights have less fade between the beams of light and the surrounding darkness. This can be a disadvantage when driving on uncertain and winding roads. The area around the beams will not be visible at all, whereas incandescent lights, while not as bright, would illuminate more of the area around the beams.
Con: Glare
The largest disadvantage for HID lights is the glare that drivers who are driving in the opposite direction experience when they pass a vehicle with HID lights. Because HID lights emit light closer to the blue side of the spectrum, which is more visible to drivers at night, the light comes across as painfully blinding to other drivers.
I respect everyones opinion, just figured I would add my outlooks as well.
