12/12 with 5 minutes Far Red

Here's a thing I'm trying, 5 minutes of halogen light at the end of a 12 hour photoperiod. It's like 12/14 because of the far red effect. Should be similar to 10/14 ripening-wise but with no loss in yield. Only 2 cycles in so far.

What nm is the halogen? 730 is the far red Emerson effect

I'm sure you've red up on it I think I've seen your postings on the matter

Indagrow said:

What nm is the halogen? 730 is the far red Emerson effect

I'm sure you've red up on it I think I've seen your postings on the matter

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Supposed to be similar to incandescent, just more efficient, so not actually pure far red. Maybe it won't work as well as pure far red. With pure far red you get crazy stretching, so I'm trying the halogens.

My understanding was you didn't get stretching if you do it post period only get it when you do it before and after.. What is it you're trying to accomplish? It would be best to find the spectrum of the light to better suit your needs

Keep us posted?

Indagrow said:

My understanding was you didn't get stretching if you do it post period only get it when you do it before and after.. What is it you're trying to accomplish? It would be best to find the spectrum of the light to better suit your needs

Keep us posted?

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No you get the stretching even with the 5 minutes end of day. They use that to make Chrysanthemums have longer stems.

Actually the halogens probably won't work, because come to think of it they use incandescents to inhibit flowering by turning it on for a few minutes in the middle of the dark period. Apparently you have to put blue plastic on it to filter out the red. Thanks for reminding me about that.

Get an aluminum bar from home depot, drill and tap holes, and screw some 730nm stars on.

churchhaze said:

Get an aluminum bar from home depot, drill and tap holes, and screw some 730nm stars on.

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Yeah if I had some. Fortunately I still have the incandescent black light bulbs that I tried a long time ago but I stopped because of the stretching. Now I'm only using them for the last week of flower. They can't stretch when they're already fully budded. That kind of black light is almost all far red and just a little UVA/blue.

Its my understanding that the Far red at 730nm, should be isolated and not coupled with UV or any other wavelength for that matter.
I didn't realize the blacklights produced that much far red. Interesting.

You can see the spectrum here. It's the only convenient FR source around. As you can see, the UV output is minimal. Last image on the page.

Yeah I saw that. Interesting but still needs to be isolated IMO or you are just extending the day cycle.