problem is when we forgot that leds are monochromatic type of lighting.
They produce narrow band and built proper spectrum without using many different types of leds is not possible..
When we started our research two years ago(before SMT(S) series was released ) we firstly measured all available "best" lighting setups for growth/coloration(t5, t5+mh etc).
That allowed us built led panel which have very wide spectrum without any gaps.
If you will compare spectrum of most popular(actually) t5 tubes which give best pigments on sps dominated tank(Aquablue/coral plus bulbs and other manufacturers models + blue plus type tube) to newest technology panels - you will see thats actually its possible to mimic needed spectrum by them without problem.
Coral plus t5 tube (and similar type) spectrum:
Aquablue ans similar tubes:
Blue plus and similar:
SMT matrix:
Only one gap which can be observed is near 550nm - that light is not so important in pigment built, because in this area there is not so many GFP pigments:
Most important area is between 490-510nm - there we can find many pigments and many manufacturers still dont remember about that important fact, typical multi chip fixtures have still gaps in that area ...
If led panels dont use white leds - spectrum built by leds(placed very,very close together) give perfect color blending and not comparable spectrum control.
Other charts to compare: