it seems more people are saying lower the intensity of the lights.
Lowering the intensity CAN have the effect of reduced growth and it will certainly have an effect on coloration.
From what I have read, increasing the lights or you much PAR has a more detrimental effect. You are going to reach the photosaturation point and the corals will shut down carbohydrate production. This is on top of potential bleaching and polyp reaction as a light intensity defense.
In short, reducing lights is the much safer bet.
Also, remember to be checking your alk consumption as it will change with a different light schedule.
Or, just be like me and run halides and reef brites

. My light settings are: ON and OFF.