Increasing Light Distance + Longer Light Period

I want to raise my lighting fixture by 2 inches. It's a Maxspect G2-170 on a 48inch tank. I want to raise it to increase the spread of light. G2-170 isn't as powerful as other LEDs. But I still want to increase the spread by raising it, to hopefully lose the dark corners.

Question is, if I raise it by 2 inches, and add another 1 hour to my lighting period, from 11hrs to 12hrs, will it suffice for the decrease in power due to greater distance from the corals?

 

That should be fine.