I'd say "white," but I guess it all depends on what you are comparing it to.

One thing I discovered accidentally this morning. When I use the 20W and 35W together, the 20W dims a little. It might be because my battery is getting worn out, or that it's too small in the first place (5 amp/hrs.)

But truth be told, I never have needed the extra bulb. The 20W energy-saver seems to work fine all by itself.

As for attaching the Optronics housings to your handlebar, if you're not concerned about appearances, you might try a hose-clamp, using sections of tire-tubes to prevent scratches (you would definitely need some rubber tubing to cover the sharp end of the hose-clamp, you don't want that sucker sticking out where it might cut you in a crash.) Some folk might think that's too sloppy, but still, it's strong.

I like the reflector-mount idea, however.