I read this statment originally on the Perfect LED Grow by physicsnole

And i have not seen any direct reply to this statement. Would this work?

Flower with shorter Nights

There are another pair of pigments involved in things here - phytochrome-R and Phytochrome-FR. Phyto-R is most sensitive at 660nm Red, while phyto-FR is most sensitive at about 730nm Far-Red, hence the R and FR naming (IE, JUST 735nm and very near wavelengths, but nothing under 710nm or so). 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.

That's 30% more light per day reaching the plant, the result is that we can pump 25%-30% more energy into the plant each day - that means 25%-30% more growth - during the flowering cycle. Pushing even longer is probably possible, with sufficient intensity of 735nm alone during some portion of the 'dark' cycle. Several experiments have already documented this effect.