Why pay a lot for a nice LED light that has only 2/3rd's of the power going to where it's needed?
It's not hard to include different emitters on the base design. Or offer a modular switch out like the lens so the user can customize the different emitters.
From a construction viewpoint, this is not a huge issue to overcome.
Then you can use the full power of the unit specific for the planted tank, not having to turn down most of the blues to get the right optimal spectra for plants.
If you have 40% of the light in the blue range, when you only need say 10-15%, and you want say 60-70% at the Red/orange range , but only have 10-15%, how's this fixable by changing the intensities?
It's not.
It's like you have to use only 1/2 or less the total power to get the right spectral light. It's like buying a Prius, but getting the same gas mileage as a big truck. At least you have the option to do this with the Ecotech lights.
You also have these same features on many of the new LED's to change color temps etc. But, you still have the same problem with the large blue weight and relative minor red/orange/yellow. The BuildmyLED spectral graphs are much better. You'll get more out of those over the entire intensity ranges used.