SPS and LED intensity

[Willito]

I want to stay away from the technically aspect on this topic as I am sure with a PAR meter the discussion can go on forever. Just want to get an idea of what a nice SPS tank is running for intensity and duration.
Besides, I wouldn't understanding the reading even if I had a meter. My success from the past has always been achieved by gauging the color and growth and keeping things as simple as possible.