Just sharing some shots here, in my relatively new tank (3month+ old), some sps color up but some do become paler. Heres a before & after shot of some sps which i own for around 2.5 months.
1.5months on Maxspect g2 170w, 1month on Razor.
I know its not SPS but even clams color up well!
before
http://s961.photobucket.com/user/fissiden/media/95761b35-a5da-4882-9f8c-13be411e3bcb_zps38bedc53.jpg.html'>
after
i got myself a sunset millie 2 weeks ago.. will update on its color.. so far so good..