not to be the bearer of bad news, but:
http://www.jlaquatics.com/phpstore/s...t_ID=mh-calp48
anyhoo, congrats. when it's time you change the hqi's you sohuld consider giesmann megachrome 13000k lamps. a friend of mine has the same fixture as you just got, with the megachrome lamps...mmmmm they're nice.