The bulb was not defective. What happened is that it (2x250hqi) didn't provide enough light for the corals and they all turned brown after 2 months. I switched to 1 megachrome and 1 AB and color came back cople months later.
Some people posted good things about the hamilton 14k, but i think it's too early to tell. I am not going to try new bulbs anymore, megachromes are working well for me. AB's are working OK. So i'll probably keep using them for a while.
I would pass on coralvue I ordered two 400w 14k SE and got 1 14k and 1 10k and no return emails.Even the LFS I bought the bulb from doesnt return phone calls and I have been at it for two weeks.
i am getting an order from AB for warranty stuff (bulb replacements) the end of this week. if you still want ab bulbs post that your interested and i'll get a price for them