I run my salinity at 1.026 also. Bleaching from the base is sometimes a lighting issue. If you have new lights coming then I'd get them on asap but acclimate the corals slowly to them. If you can raise them fine, screen over the tank will also work. Calcium at 500 is high, so I'm wondering what your alk is and hoping it hasn't bottomed out low. Sps corals are one that will not tolerate changes for the bad. Any one thing gets off balance and they will show signs of not being happy.
I think I can raise the light safely. How much would you recommend? I came on the FedEx truck, how long before I should try to put power to it? Going to try one and see how I like the 12K.