Grow room set up newbie

My grow space is going to be upstairs in a barn style shed. I will use 4 five gallon buckets as grow stations, about 3 square feet. The system has a 5 gallon mother bucket, it is a DWS with air stones in each grow station and a 1,000 GPS pumped to circulate nutrient solution. Thought this system the most forgiving should there be a power outage.
Next concern - Upper room of barn shaped building with the ceiling being about 4 feet above the floor. I have used radiant barrier to insult the ceiling while also utilizing the reflective backing! I am still concerned with heat so I am considering a Kind K3 veg L600 for overhead lighting and (2) fluorescent fixtures, one mounted on either side of grow area. I will start with grow lights in the fluorescent fixtures and at the appointed time go to flowering bulbs. Concerned about heat in a confined space.
Next concern - height from top of grow station to led lights is 3 feet. Guessing this will limit my grow phase.
I will be moving a small self-contained air conditioning unit in next to keep it a pleasant 75*. Ventilation will finish up the project.
Have any suggestions on my lighting plan or in general?

Reading a few posts I believe I need to up my lighting. I am considering the “Kind K5XL1000” which is rated at 1,000 watt equivalent. Now I will choose 2 fluorescent fixture at 1,000 watts each. Any suggestions?

Specs on LED light:
Grow Area 5 ft x 5 ft
Ideal Height From Canopy 12" - 30"
HPS/HID Equivalent 1000 Watts
LED Lifespan 50,000 Hours
Power Consumption 650 Watts
Voltage 100-240 Volts
Dimensions 26" x 20" x 3.5"
Weight 36.0 lbs
Warranty 3 Years

I am adding 2 fluorescent fixtures, four T5 bulbs each, one on either side. The bulbs are rated at 2,600 lumens each for a total output of 10,000 lumina or so. I like to round down! The lumina / watts thing is confusing.