Depends upon the form of the HID capsule proper - if it's an H4 style, you can probably use the lenses you have now, and they'll just be brighter (and whiter, probably, with just a slight bluish cast. Side effect of the light generation.)
The "HID" is "High Intensity Discharge" - as I recall, it's an electric arc, rather than just a filament heated to incandescence. That's why you get a bright white light with a slight bluish tint - it's the same sort of light you get from an arc welder (just with a MUCH lower current involved, which is why it won't strike you blind, and can be used for illumination.)
I suppose we should first pose the question, tho - why for do you need more light? What are you trying to do? Sounds silly, but knowing that will help drive lighting selection...
If you want more light just to be difficult with people, tho, I won't be any help. I, for instance, run 90W/130W Super White H4 bulbs simply because I do a lot of driving on mountain roads and in unlit areas, and I like to be able to see. I use these bulbs with "E-code" bowls, which gives a much sharper low beam cut-off (allowing me to run more light without annoying oncoming traffic) and a fuller high beam (giving more illumination.) I have wide-angle driving lights (100W Super White bulbs) for short-range fill-in when the full beam is on, since the E-code bowl gives a more focussed full beam with less "spill" near the vehicle. This allows me to catch things at the side of the road that would not otherwise be lit with the full beam - and the whole thing was done for "driver safety" considering the conditions I tend to find myself in. It was a little more work to aim my headlamps, but it's been worth it, since I don't get any "flash" complaints from oncoming drivers (even with my low beams being about twice as bright as their high beams...)
5-90
