It really depends on what you’re trying to do with the light. Those eb strips are probably putting out 2x the amount of light per watt that a cfl does. Another thing to consider is that fluorescent lamps put their light out 360 degree beam. So 25-33% of their light goes toward your canopy, and the rest is lost or has to be reflected. These, like most leds, put 100% if the light they produce directly toward your canopy.
The particular light I built was designed to veg 3 or 4 plants for about a month in a perpetual grow. The fixture all said and done is about 24"x16", and was built to light an area that’s about 32"x 20". The light nor the area aren’t really ideal for vegging plants out over a couple months. Nor would it be a great light to flower under. But it doesn’t require a ton of light to veg a plant well. If you keep the red wavelengths away and the light close enough, they stay short and will bush out with a little help.
In your case, you would probably want the longer 1120mm strips to replace that fluorescent fixture. They’re almost 4’ long. They are about 44 volts each, and running them at 700ma would give you about 30 watts a strip. To get a good spectral mix, I would probably alternate 3000k and 5700k strips. You just decide how many watts you want to run, and that determines how many strips and what drivers to buy. Or, you get all 4000k strips and size the same way. You definitely wouldn’t need to replace those cfl’s watt for watt. If you wanted, you could even do 2 smaller fixtures and put one on each side. That’s the joy of diy lighting, you build what you need.