Look at the spectrum given off by the "all white light" cxa/b3070s... it's probably about as close as your gonna get to hitting the RIGHT peaks in the RIGHT amount using quality parts, delivering some serious amounts of light...in one of the most efficient ways, optics have losses and these cobs typically don't need them unless you're lighting a ~4x4 space or are keeping the light raised 24+" above the canopy, which means no losses.
Those 7-11, 14 band wavelength panels are usually junk, and are stuck in the dinosaur Era of LEDs where the big SALES PITCH was their way of being efficient was targeting the important nanometers, where the reason they are a better light source than others- is they are typically more efficient, regardless of targeting a wavelength or not.
Be aware if you target to much of one wavelength and not another. You will bleach your plants. Good luck and hopefully you understand that it's worth the investment