I think you may have misunderstood what you read hear is a clearer article http://plantphys.info/plant_physiology/phytochrome.shtml 660nm light turns on flowering and wakes the plant up. 730 puts it to sleep and stops flowering.I am adding 660nm leds to my fluorescent lights to help stimulate flowering and one induction light maker sells 660nm led "pontoons" for their lights to help flowering, you can find IR leds on ebay but they are only useful for 10-20 minutes after lights out to help put the plant to sleep faster. during light on they would only lower the PR/PFR and inhibit flowering.
IR triggers the release of the flowering hormone but is always present. red during the lights off period will stop flowering but during lights on PRF drives growth. far red is always present. it is just heat and if exposed to it long enough (long nite) the hormone released will switch the plant from vegatative growth to flowering but the growth itself is driven by PRF.it is important to insure an uninterrupted long dark period to put the plant in flowering which is the role this hormone plays but during "daylight" a high pr level is needed to drive growth
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Photoperiodism.html http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/P/Photoperiodism.html I think the confusion comes from the fact that you are addressing night time light exposure. actually my training is in the area of electrical engineering. like you and many other growers I read the publish studies in an effort to understand and find better ways of growing.plants are very active at night (krebs cycle) and the long night simply increases the amount of flowering hormone produces but photochrome is the pigment that shifts a plant from day to night shifts. each shift has a role to play and both are vital. but it is the length of the night that determines how much flowering hormone is produced.if the air temperature is high enough for the plant to survive then it is getting enough IR.but then all photo growers know that you need a long night to flower photos. and interrupting that night will inhibit flowering so a highly technical discussion would add little. all these studies deal with interrupting the dark period with red light and except for artifically extending that period with a brief period of IR (10-20 min) immediately after lights out nothing would be gained by adding it during the dark period. but growers already know this.theory is a good starting point but no substitute for hands-on experience. you started this thread looking for 730 NM CFLs and you are not going to find them 660nm and IR leds are the easiest way to generate these wavelengths if you want to play with them. but led growers already know that large amounts of 660nm are benifitial during flowering. IR is only added in small amounts for the Emerson effect. in reading the links you gave I find that Mr rosenthal is saying the same thing that I am
I find this to be untrue a lot of indy dom's will go into flower with as much as 14 hours of light i.e 10 dark ? and a lot of sativas won't even bat an eye till your rite in 12/12.......
