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OfflineChickenNugget
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Registered: 07/05/05
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Flourescent lighting
    #5370055 - 03/06/06 08:05 AM (17 years, 10 months ago)

Hi, I was wondering if a 15w flourescent bulb will work for seedlings. I will be sprouting a plant then transferring outdoors in 2 weeks. The seedling has popped out of the ground, and i shall leave this light on for 24 hours, 2 inches from plant to light, correct?

The plant stem is already turning green, and it's been under the light for only 3 hours.

I used some potting (topsoil/perlite) mix with a tad throw in of cow manure.

Also, how long will it usually take for the seed coat to come off the seed leaves?


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Edited by ChickenNugget (03/06/06 08:06 AM)


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OfflineAKSE
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Re: Flourescent lighting [Re: ChickenNugget]
    #5370336 - 03/06/06 10:21 AM (17 years, 10 months ago)

Yikes, 15w is MUCH to low, even for seedlings!

Get a double 40w housing, then you'll have 80w atleast. That should be your bare minimum, fluorescents aren't a very good spectrum choice, but they are most certainly better than hologens and fine for growing. You need alot of wattage for fluoros to work properly though.


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OfflineChickenNugget
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Re: Flourescent lighting [Re: AKSE]
    #5370528 - 03/06/06 11:30 AM (17 years, 10 months ago)

Thanks


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OfflineAKSE
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Re: Flourescent lighting [Re: ChickenNugget]
    #5372797 - 03/06/06 11:10 PM (17 years, 10 months ago)

No problem, feel free to pm me if you need any additional help.


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OfflineHrethic
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Re: Flourescent lighting [Re: AKSE]
    #5374159 - 03/07/06 12:52 PM (17 years, 10 months ago)

Well... for ONE seedling, 15 watts is alright. Just make sure that as soon as the leaves start to go outside the bounds of the light, or start shadowing others, then you get some more light in it. It's only one plant right? I only have 26 watts on my little Walmart bought strawberry plant, and it's doing just great. Of course it's going to get full sun very soon, but for a starter light, you should be good for a least a little bit.


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OfflineAKSE
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Re: Flourescent lighting [Re: Hrethic]
    #5376044 - 03/07/06 09:58 PM (17 years, 10 months ago)

On second thought, I wouldn't even bother starting only one plant if I were you, unless you don't care if you don't get a yield...

What if your plant turns out to be a male? I would atleast start a few and then atleast you'll have a better chance of getting a female. If you are just growing it for the experience though, have at it!


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OfflineVertigo6911
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Re: Flourescent lighting [Re: AKSE]
    #5378349 - 03/08/06 05:28 PM (17 years, 10 months ago)

make sure your tube is the right color too.
coolwhite should work well.


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Offlinedanthefuckinman
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Re: Flourescent lighting [Re: Vertigo6911]
    #5380144 - 03/09/06 02:42 AM (17 years, 10 months ago)

Compact florescents will suffice if you're looking for something cheap. they tend to generate a tad bit more heat than that of the long tube floros but this should not be a problem, as long as the plants aren't riding the bulb's ass. CMF's have a great light output and run at very low wattages... i believe a 15w cmf is equivalent to a 40w bulb, in terms of lumen output. i would personally go with a 4 foot shoplight running cool white bulbs, on a 18/6 cycle. be sure to have a fan blowing them babies to ensure healthy strong stems and proper air circulation. the "seed leaves" as you call them are known as cotylens and are only temporary. they will begin to turn yellow and fall off. do not be alarmed when they yellow up. as the stem fattens, these gradually break off. do not remove them prematurely because they contain cholophyl and contribute to the whole photosynthesis process, a plant as young as a seedling needs every little bit of green to get its thing going.

2" from bulb is good with cmf's (depending on the heat output, 3.5" might be better) but with tube bulbs, i find you can have the tops a quarter to a half an inch from bulb, given that the growspace has adequate ventilation and airflow.


good luck my friend. hope all goes well.


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InvisibleHamstercut
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Re: Flourescent lighting [Re: AKSE]
    #5380447 - 03/09/06 07:57 AM (17 years, 10 months ago)

Quote:

AKSE said:
Yikes, 15w is MUCH to low, even for seedlings!

Get a double 40w housing, then you'll have 80w atleast. That should be your bare minimum, fluorescents aren't a very good spectrum choice, but they are most certainly better than hologens and fine for growing. You need alot of wattage for fluoros to work properly though.


?


Edited by Budsky (03/09/06 07:59 AM)


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OfflineAKSE
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Re: Flourescent lighting [Re: Hamstercut]
    #5380681 - 03/09/06 10:10 AM (17 years, 10 months ago)

Quote:

Budsky said:
Quote:

AKSE said:
Yikes, 15w is MUCH to low, even for seedlings!

Get a double 40w housing, then you'll have 80w atleast. That should be your bare minimum, fluorescents aren't a very good spectrum choice, but they are most certainly better than hologens and fine for growing. You need alot of wattage for fluoros to work properly though.


?




What? I've grown with fluoros many many a time.


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Offlinedanthefuckinman
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Re: Flourescent lighting [Re: AKSE]
    #5381118 - 03/09/06 12:24 PM (17 years, 10 months ago)

actually florescent lighting does have a decent spectrum and kelvin composure, it's the light intensity that earns unsatisfactory points. the amount of bulbs necessary for deep penetration is very high and almost ridiculous in comparison to an HID setup of just one bulb. though floros are my light of choice for the vegging period of plant growth. they can even suffice for plant sexing... but when it comes down to it, marijuana flowers need a light with strong intensity and lumen output. something very difficult to achieve with normal florescent setups.


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