Personally i think this was a post saying "how much bud would I make IF..."
Although if you had a rectrangle that was 5'x14' long I could see them fitting in a long row down the 14 foot length. THATS 70sqft and the light would perfectly envelope the entire row.
( I I I I I I ) - what I mean
Or 10x7
( I I I )
( I I I )
but he says its a 5x5 area that the plants sit in, so I just don't believe the man.
(make me eat my words and give us a piccie.)
In Fact a dual bulb cooltube is made in two sizes 48 inch and 60 inch SO I DONT see how they even fit, and the reflector that come on them are a foot wide.