I have 4 Kessil a360WE Tuna Blue lights over my 4 foot 120 gallon. They are in a straight line across the tank. I added a 5th on the end and arranged the last two in a "T" arrangement. They ar 6" off the water in a 24" deep tank. SPS in the top 1/3 and hammers and frog at midlevel and lower 1/3. I decreased the intensity from 77% to 65% which is about a 15% drop and will increase back up to 77% over about 10-14 days. Seem appropriate or should I reduce by more?