Is there such a thing as too much lighting?

I have the flowering part of the nursery at 14'L x 12'W. The actual flowering foot print will be 6'W x 10' L so that I can walk all the way around to do maintainance and check for problems. The Adjust A Wings that I will be using suggest a footprint of 7'W x 11.8'L. So I am wondering if the 3rd 1k light is to much?

Mind you... sealed room, co2, water cooled lighting via iceboxes, chiller and cooltubes.

Thanks for the help.

two 1000 watt lights gives you about 5,000 lumens per square foot. three gives you 7,500 lumens per square foot. the recommended light is 7,000 - 10,000 lumens per square foot. so, yea i'd say go with three.

Thank you sir... will do.