Just to prepare the "ground " ......
You can not compare two different panels,made of total different quality and efficiency ,parts .....
Just based on their output spectrum ....
If both are made by same/close quality & efficiency parts (and of close /same efficient design ,of course ..),then yes
one can compare them ,to get some kind of " correct " / "trustworthy" results .....
Now ....
Those (present) Astir panels .....
Even with their cheap design & parts .....
Hmmmmm...
...
The ones of you people,who have a wild imagination ,
set it loose for a minute ,to imagine those Astir panels ,made of high quality/efficiency parts .....
Versus
ANY Blue/Red combo panel ,at ~ same Wattage ?
Ha! Piece of cake ...
Simply,a mere piece of cake .....
By far superior ....
What do you say ,brother Eraserhead ?
I'm guessing that you would 've agreed on that ,100% ....
Just preparing the ground ....
Some,probably they're gonna have a "hard " landing ....
.....
Just a bit of patience ,is all what is needed ....
P.S. :
I wonder ....
How fast human memory fades ....
Not that while ago ,we ( almost all of us ),have been growing
plants under a
heavy green-yellow spectrum ....( average HPS...)
With lamps of 0.3 efficiency ....
Now ,with leds ....
It's just like the plants also changed "light spectrum " preferences ,
along with the growers changing light type...
Like ...
Millions of years of evolution ,changed like that ...
Just because ,us humans,some decided to go leds ....
Well plants adjust,in fact ...
Up to a certain level ...
Which does not necessarily mean ,that they grow as healthy or vigorous also ....
They grow,yes ..."Thriving " ,is another issue ...
( And ,still ,time has passed since leds first ,were incorporated/used for plant cultivation ....
That was a time that only reds existed and blues were being commercialy available for first time ... ....
White _phosphor_leds ,probably ,did not exist even as an idea , back then ....
..
Ok ....To say the whole truth ..
B/R combos do 'work' really efficient when low overall fluxes,are used ..
It's like plants ,when not much light power "around " ,they "focus " on these two bands ...
Their main PS pigment absorption peaks ...
So,good led combo, for growing green ,leafy bedding plants ..(to cultivate in great numbers ..)
Do not need much light power/ electrical energy to preserve them at a vegetative stage ,during winter ,inside vast greenhouses ..
Waiting for the Spring sunlight ,to come ...
But for inducing heavy flowering to more "needy" plants ?
Nope ...
There you need moderate to high fluxes ,if only art. light is utilised ..
And at moderate/high fluxes ,Red & blue leds ,suck big time ....
They just fry everything underneath them and/or yields are not "up to", the electrical energy used ...
Still today,years after ,some consider that paleolithic combo ,an efficient one ....
Well ,that's their right ,I guess ....
But evolution ,will not wait for them ....
Either they will 'adjust' .....Or 'vanish / extinct' ....)
From what I've seen other growers pull from these panels I wouldn't hesitate to say that they are one of the best on the market for the money and due to their efficient(low watt use) design you can even run it in a sealed room in the summer with no AC !!!>>>>> 
