the way i see it is this , the plants produce it as protection , the higher the elivation the more intense the light is and proven higher trich production , so why would you turn thos lights off ?
an example i could honestly and personally experienced give is this ,,,,
when i take a harvested plant with some lowers left on for re veg and i put the plant back into 18+ lighting those lowers just cake on the trichs , meaning they produced far more in 18+ lighting then they had been producing in 12/12
so no imho it is not any use in giving those extended dark periods , imo the extended dark period would be BAD THING
and yes ive done 2 days dark and even 2 weeks dark with everything between , i have yet to see any benefit
peace
edit, when i say the revegged plants produce more trichs in 18+ , thats only temporary , for maybe a week , once the reveg takes hold trich production become minimal like any vegging plant , but with that said , id say we would be better off giving the plants 48 hrs of lights on rather then lights off
and yes i know light and heat kill it , but that obviously does not happen over night , on a living plant it remains living