I have since replaced both with a Twinstar brand since my local ADA store is a distributor. I hope they work.
Did you get it from Aqua Forest Aquarium in San Francisco?
I recently received a Twinstar 600SA from them. I really recommend AFA as a vendor. I had an issue with the first one not fitting my tank correctly due to a design oversight and they cross shipped me very quickly. Very nice light also. You have made a good choice.