The best thing you could do, is just cut back on your feeding by about half.
Although lighting for 13 hours is a lot, Cyano
doesn't have that much to do with light. Cyanobacteria is just that, bacteria, not really an algae. Although its called Red Slime Algae. I would cut back your lighting to maybe 10 hours whites, 11-12 blues.
The biggest contributing factor is excessive feeding, causing excess nutrients (nitrates, phosphates) in your tank.
You should also have sufficient skimming and water movement to export the nutrients that you have to put in the tank.