Whenever the fan is on the ozone should be on.
Important to seal it well. I had to use duct mastic on my 12" adjustable elbows, even foil tape let ozone escape.
Ozone will break down your rubbermaid making it brittle in time.
In our studies, using three 315's will replace a 1kW hps with a potential yield increase. Have achieved over 1.2 gpw. Downside is the cost of three lights instead of one.
Biased source spewing pseudo science.
Seriously, claims of cucumbers 18 inches longer than normal? Since the 60's nobody went anywhere with this because they were unlikely able to duplicate results.
I call bullshit.