It's starting to look to me like the primary effect of far-red is telling the plant its got lotsa nearby neighbors, and to stretch to outgrow them.

I'm seeing a lot of anecdotal evidence--and reasoning that I suspect is based on faulty premises in regard to the red / far-red connection.

This is from Physicsnole (old). Have you encountered any supporting studies? For one thing, is this talking about intiating flower, or maintaining it? Both?

I would like to believe this stuff. And Leadenjin must have a reason for offering 735's. But wanting to believe it may be clouding some judgements. What do you think?

With 735nm far-red/near-infrared emitters available then it's possible to flower cannabis with 15 hours 'daylight'. How? Why? Well, the plant senses that critical 12-hours-darkness that triggers flowering in cannabis because a critical amount of phytochrome-FR has slowly, naturally, reverted to phytochrome-R during the dark cycle. But during the 'day' 660nm red light converts the phyto-R into phyto-FR, while far-red 735nm light more slowly converts the phyto-FR back to phyto-R. So we run all lights for 15 hours, then run nothing but 735nm for another two hours and finally 7 hours darkness.- artificially driving much of the phyto-FR back to phyto-R without waiting 12 hours for the natural reversion- so you can actually flower with shorter nights.