They are independent peer reviewed. Stop being lazy. They are not from frontiers, they are available there.... copy paste and find the studies if you doubt the summary... or just stick to Wikipedia... Obviously you did not read them if I have to say this.
Now stop the trolling bullshit.
look that's rude . I am not exactly sure what you are pointing at .
1) I read the study...the only one you provided. It stated it MAY help .
2) the site FRONTIER is listed as NON peer reviewed and MIXED factual references.
3) the "peer" reviewed studies on frontier
4) wiki article ALSO has references citing peer reviewed studies . there is also no reason to believe the info is not factual. math Is math . or just read cited references
Now , these are just 2 . there should be a lot more .
The marijuana bus is susceptible to money manipulating science like any other. same with lights .
I am not saying that different spectrums can not have some beneficial effects , but not anything beyond a couple percentage points in yield or quality.
more light =more plant mass ( as long as minimal spectral requirements are met )
Better PAR will add +/-5% yield quality beyond what just the increase in light efficiency will do .
I WILL SUPPLEMENT OR PAY FIR AN EXPERIMENT TO BE CONDUCTED .
400 w hps to 400 w led .
my prediction? led does 20% better because of its higher lumen per watt total light output