Yes, they are HID's. We've got a couple of m/a companies that have retrofitted them into all of their rigs, and love them. I couldn't sell my dept on retrofitting them, but was able to get a pair in the new engine. I'm willing to bet that as soon as a couple of drivers get to go out at night with them, we'll be switching the rest of the trucks over to them. I think they were about a $1300 option from Sutphen.
The only downfall is that I IIRC, you can't use a headlight flasher with them. Not a big deal for me, I think there is enough warning up front with the fully populated lightbar and the 2 pods above the headlights.