An actual measurement of the light intensity beats any calculation. You measured 5000 lux, and the conversion factor for lux to PAR is around 78, so, based on that you have around 65 PAR, at the location where you measured the light. If that is at the top of the substrate, then you have high medium light, perhaps high light. You will need to use pressurized CO2 to use that much light. But, if you measured it closer to the light than at the top of the substrate, you will have less light, possibly much less. I'm assuming you measured the light that you are using on the 10 gallon tank?
I have data for 5630 LEDs, which produce about 30 lumens per LED. Based on that, and assuming you have 2 inches of substrate, with the light right at the top of the tank - 15 inches from the substrate, you should have about 20-25 PAR, which is low light. Your light is about 20 inches long, and the tank is 36 inches long, so only the center 2/3 of the tank will get enough light.
Based on your measured 5000 lux, assuming that is with the 10 gallon tank, at the substrate, we can estimate what you would get on the 40B. Assuming you use 4 strips instead of the 3 strips you used on the 10 gallon, and each strip is actually 2-50 cm strips in a single row, or 8 total strips:
You would get about 4/3 times 5000 lux, to account for more strips. But, at a distance of 15 inches instead of 10 inches: 25/40 times 4/3 times 5000 lux = 4200 lux, or about 50-55 PAR, which is medium light. But, the longer strips (twice as long) also increase the light intensity, perhaps by a factor of 1.5, so that would give you about 75 PAR, or high light.