Yeah, these are so so... you need to connect 3 in a row to make up a 4ft double row f series but you would still be down 40 to 50% on light output for the row. An LT-FB24B will dump nearly 18000 lumens from the same footprint compared to about 10600lm from three of those in a row.
As long as they are cheap enough I guess one could stack them dense enough to get an equal output, but didn't see the price.