Killerweed, I listed the site right in my response bro. Let me remedy the confusion....Quantum 600w dimable electronic $177.....Lumatek elec ballasts:250w $115, 400w $133 600w $175...1000 $325. Even if it's a 1000w that Goldendome wants, why would a guy buy a ballast kit for $100 when a new xtrasun is $140 and a 400w is $91?.......$75 more than a mag kit for the highly desired 600w= no brainer