I just bought a new Current USA Outer Orbit fixture and it came with 2
Powerpaq 150W 10,000K DE halide bulbs. I prefer 15,000K bulbs so I switched these out. They have been used no longer than 1/2 an hour. $80.00 plus shipping, if your not local, for both.
http://www.current-usa.com/outerorbithqit5ho.html