Blue light after 'dark'?

[RackitMan]

Has anyone here tried using pure blue light (LED or actinic fluoro) during the 'dark' or night phase when in 12/12 light cycle to keep photosynthesis going without interrrupting the flowering phase?

I have one of the newer 50 watt blue LED panels and may give it a try, but would like to get some feedback first.

RackitMan Reviewed by RackitMan on 05-16-2009. Blue light after 'dark'? Has anyone here tried using pure blue light (LED or actinic fluoro) during the 'dark' or night phase when in 12/12 light cycle to keep photosynthesis going without interrrupting the flowering phase? I have one of the newer 50 watt blue LED panels and may give it a try, but would like to get some feedback first. Rating: 5

[the image reaper]

Edit: sorry, I started to answer your question, but am now aware, that I don't understand what you're trying to do, with the blue light :wtf:

[oldmac]

Has anyone here tried using pure blue light (LED or actinic fluoro) during the 'dark' or night phase when in 12/12 light cycle to keep photosynthesis going without interrrupting the flowering phase?

I have one of the newer 50 watt blue LED panels and may give it a try, but would like to get some feedback first.

Hi there RackitMan,

I'm also not sure what you hope to gain by that. I use a super actinic white in my cloner light set up and sometimes used to start germed seeds. Use only the actinic till roots show or seedling emerges and then add 6500k fluoro. Ususually keep actinc white going also.

I know of some people who are using blue LED panels for clonning, but not used during dark period.

Some here are curious, I know I'm curious, tell us more please.........


couple of pics of actinic in action

[BeFree]

http://boards.cannabis.com/grow-log/...an-method.html


I've heard of far reds at night and whatnot. I dunno what to tell ya bud.

beSafe:jointsmile:

[RackitMan]

Hi there RackitMan,

I know of some people who are using blue LED panels for clonning, but not used during dark period.

Some here are curious, I know I'm curious, tell us more please.........

To the best of my knowledge, 12/12 red light signals the plant to flower whereas blue light does not trip flowering on or off. Therefore, using pure blue during the normal 12 hour 'off' period should allow photosynthesis to continue without disturbing the flower cycle. This should allow for greater/faster growth if my hypothesis is correct.

As I only have time/space for 2 mini grows per year it is difficult for me to test at this time.

[oldmac]

To the best of my knowledge, 12/12 red light signals the plant to flower whereas blue light does not trip flowering on or off. Therefore, using pure blue during the normal 12 hour 'off' period should allow photosynthesis to continue without disturbing the flower cycle. This should allow for greater/faster growth if my hypothesis is correct.

As I only have time/space for 2 mini grows per year it is difficult for me to test at this time.

OK Rackit,

First, since you are doing just a couple of grows a year in limited space, you need to stick to tried and true methods to grow. It's the best way to get good and consistent results. I would assume if one of your two grows went tits up it might be a lousy year.

Second, just recently I kinda tested that theory (without knowing it) and the results were unwanted hermies. I built a couple of rooms on the quick and cheap and used 1" thick Dow "blue board" stryfoam insulation to make the walls. Realized it was not light tight, but in the bloom room with lights out, there was no light bleed thru two layers of foam with a cloner light set-up going. Unfortunately I did not check it again after I started using a 600w MH, about a month later I was checking the bloom room for the sequencing of the lights and light fan going off. After everything went dark and my eyes adjusted, I saw this large blue sunrise thru the wall, I could even see where the wood wall studs were. Next day covered the offending mom room with white poster board to solve the problem.

The result of this "blue glow" for abt 3-4 weeks was hermies. Not a fun way to start a grow.
Just based on this experience, I don't think it would work, unless you consider growing seeds "greater" growth.

[the image reaper]

I'm still foggy on the reasoning behind this, so be patient with me ... if you're just trying to delay flowering, just leave the plant under 18 hours of light ... I gotta be missing something here :wtf: ... but, unless you're growing sativas, you should have plenty of time, to grow out two gardens a year ... that's a piece of cake ... in fact, with 50-day varieties, three harvests is easy ... regardless, good luck, sorry I couldn't help :smokin:

[Italiano715]

Basically, he/she would be growing in 24 hours lighting if you have a blue light off at dark.....I seem to be missing the point also. :wtf:

[RackitMan]

Basically, he/she would be growing in 24 hours lighting if you have a blue light off at dark.....I seem to be missing the point also. :wtf:

Forget my personal grows, guys - that is not relevant.

What is not to understand? 24 hours of growth > 12 hours of growth. This is pretty basic.

[headshake]

from what i understand, the blue spectrum of light is only responsible for certain things in photosynthesis. in part for chlorophyll a, chlorphyll b and phycoerythrin and (almost) all of the carotenoids. and the very beginning of phycocyanin.

so i'm not sure if the blue light running 24 hours would be of benefit. i have no scientific proof of this, it's just a hypothesis.


-shake