Ok so I've got a 4'x1.5' area that I plan to grow in and I want to make sure that my math here is correct.

4x1.5=6 sq. feet....6 square feet will need around 60,000 lumens ....and at about 65 lumens per watt that is a little over 920 watts

does this sound a little extreme to anyone else or did is my math looking good on this one.