i guess i have to answer.
Fathom led are the best led lights out there. They worked wonderfully well on my reef and i loved the lights while they lasted. Check my tank thread for pics.
Alas, they are extremely unreliable and tend to break down. 7 out of the 11 i had malfunctioned.
Add to that that fathom led was a one man show. When that one person is out of commission what do you do? Watch your reef die or scramble to switch your lights to something reliable.
I know there are multiple folks here and on other forums who bought these lights because i went that route, but i also know they are all in the same boat right now.
Great lights but, they just do not last.
Sunny