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Offlinechewieu
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Registered: 02/03/03
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Blue LED, 470nm Wavelength?
    #2525807 - 04/04/04 10:38 PM (12 years, 8 months ago)

I have been thinking of making myself a new fruiting chamber, with a strip of blue LED's of the 470nm wavelength on the inside for lighting. I have read that light of the 480nm wavelength is best, but I got the impression that white light with just a hint of the blue is best. My question is, would it be best to mix the white and blue LEDs, use just straight blue, or just keep to the white LEDs. OR does it not even matter? Also, is it generally a rule that the brighter the better? Thanks everyone!


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Offlinefresh313
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Re: Blue LED, 470nm Wavelength? [Re: chewieu]
    #2529233 - 04/05/04 10:24 PM (12 years, 8 months ago)

id say do blue w/ a few white or use a uv lamp w/ grow blue spectrum bulbs.


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OfflineRacer6908
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Registered: 03/23/03
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Re: Blue LED, 470nm Wavelength? [Re: chewieu]
    #2533298 - 04/07/04 12:05 AM (12 years, 7 months ago)

I've used a grow lamp with blue spectrum bulbs and it seemed to speed the growth of the creeper and Allen strains, but not in a good way they matured too quickly and the caps would be folding up at like a 1/4 of there average or potential size, so I would say try experimented with some LEDs personally. Pinkeye


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If It can grow in nature, than it's not a Drug.


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Invisibleshroompuff
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Registered: 02/13/04
Posts: 64
Re: Blue LED, 470nm Wavelength? [Re: chewieu]
    #2534131 - 04/07/04 09:44 AM (12 years, 7 months ago)

brighter is not better for MJ thats a good thing, but if you can see the shrooms there is enough light, I set my fruting chamber by a window with a closed blind and it works very well.


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Offlinedistortion
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Re: Blue LED, 470nm Wavelength? [Re: shroompuff]
    #2544012 - 04/09/04 05:14 PM (12 years, 7 months ago)

Where would you find a light in the blue spectrum with a wavelenth of 480nm? Also, does it make much difference compared to a flouro or incandescent bulb?


--------------------
Think for Yourself. Question Authority.

-Timothy Leary


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InvisibleWormsy
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Registered: 03/24/04
Posts: 92
Re: Blue LED, 470nm Wavelength? [Re: chewieu]
    #2545890 - 04/10/04 04:43 AM (12 years, 7 months ago)

here:

Color Classer 75 7500 93
Color Classer 75 Plus 7500 91
Vital-Care 75 7500 91
Daylite 65 6500 92
Vita-Lite 5500 91
Vita-Lite Plus 5500 91
Vita-Lite Supreme 5500 96
Natur-Escent 5500 89
Aurora V 5000 85
Optima 50 5000 91
Color-Gard 50 5000 91
Color-Matcher 50 5000 90
Classic-42 4200 82
Cool White 4200 62
Aurora IV 4000 85
Classic-35 3500 85
Optima 32 3200 82
Color-Gard 32 3200 82
Aurora III 3000 85
DSW 30 2770 79

Look for a 6000 or better Kelvin (K).

reason is to decrease reds that hurt fruiting.


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Offlinedistortion
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Re: Blue LED, 470nm Wavelength? [Re: Wormsy]
    #2547327 - 04/10/04 11:51 PM (12 years, 7 months ago)

Cool, thanks for the list wormsy! I'm still searchin around for a 480nm light.
The only thing I found as of now is a TL-140W/03-PHILIPS with a nm of 380-480. How do you know if it will be 380 or 480? Isn't there a light with a constant flow of 480 nm light? If anyone has a good light to recommend, please post it or PM me.


--------------------
Think for Yourself. Question Authority.

-Timothy Leary


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Offlinemycoguy
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Re: Blue LED, 470nm Wavelength? [Re: distortion]
    #2554971 - 04/13/04 03:58 PM (12 years, 7 months ago)

my GUESS is that because of inconsistencies in power supply, the light will fluctuate between 380 and 480. if you had a power conditioner, you could probably stabilize this phenomena, but you'd still need to find the white-papers on the bulbs, to find out how much power = what wavelength. and connect a dimmer (potentiometer) to control the power to the bulb.

all in all, shrooms need from very little, to no light at all.


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(and no, that's not me in the avatar)
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InvisibleATWAR
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Re: Blue LED, 470nm Wavelength? [Re: distortion]
    #2555836 - 04/13/04 07:05 PM (12 years, 7 months ago)

You have to understand that LED's are usually rated for their peak wavelength. That is, 480nm is the wavelength which has the most intensity. Even though it says 380nm-480nm, it is still putting out light in both higher and lower spectrums as well. It is usually graphed like this:



This shows the peak, which is the intensity of light. The light on either side of the spectrum of the peak drops off sharply. And yes, different voltages will change the peak wavelength of the LED.


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Invisibleutopianglory
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Registered: 07/20/02
Posts: 965
Re: Blue LED, 470nm Wavelength? [Re: ATWAR]
    #2557420 - 04/14/04 01:34 AM (12 years, 7 months ago)

Leds generally have much more narrow view angles to get their peak light intensity aswell. Something to remember.

Don't go too all out on the lighting it is really not that important.


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Offlinejohnjrambo
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Registered: 03/12/04
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Re: Blue LED, 470nm Wavelength? [Re: chewieu]
    #2557715 - 04/14/04 03:20 AM (12 years, 7 months ago)

i have been reading about lds for the past hour and i read that the white leds are just blue leds covered in some sort of phosphur. so basically i was thinking it would be good to use blue. i was looking on making one tommorow out of blue and red ones but am having trouble locating a good tek on how to make a led array. i ve found one on overgrow.com but it seems difficult for someone who has only used a soldering gun twice.


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Offlinejohnjrambo
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Re: Blue LED, 470nm Wavelength? [Re: johnjrambo]
    #2557723 - 04/14/04 03:23 AM (12 years, 7 months ago)

oh would red light hurt fruiting. and how?


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Offlinechewieu
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Re: Blue LED, 470nm Wavelength? [Re: johnjrambo]
    #2583978 - 04/20/04 07:42 PM (12 years, 7 months ago)

I was planning on just taking maybe 6 blue LEDs and some of those nice panel mount LED holders from radio shack and mounting them on the lid of my rubbermaid.. then i was gonna get a cheap microcontroller - i program PICs, they are very easy - and just have it turn the LEDs on for 12 hours, then off for 12 hours. All in all the setup should cost less then $20 and give me good blue light supply with no hassel. I'll post a pic of the setup when i build it over the summer. I'm using 6 spread out over the lid because, as somebody mentioned, the LEDs have a narrow viewing angle (if you get non-diffused which have much greater intensity... i still may get diffused ones since everyone is saying shrooms don't need much light). Thanks for the input everyone. Oh and I found that they now have UV LED's in the 330nm or so range if i'm not mistaken. I might try throwing some of these in a second chamber to see if they change anything.


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Invisiblezeta
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Registered: 05/25/02
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Re: Blue LED, 470nm Wavelength? [Re: chewieu]
    #2597248 - 04/24/04 05:49 AM (12 years, 7 months ago)

If it costs $20 then that's $20 too much. This is so unnecessary


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Offlinecreekfarmer
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Re: Blue LED, 470nm Wavelength? [Re: johnjrambo]
    #2597275 - 04/24/04 06:33 AM (12 years, 7 months ago)

It doesn't hurt fruiting, it just won't encourage it. You can peek at a colonizing substrate with a red light with no worries about initiating pinning for example.


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OnlineGr0wer
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Re: Blue LED, 470nm Wavelength? [Re: chewieu]
    #2604886 - 04/26/04 03:54 PM (12 years, 7 months ago)

Im going to use 19w daylight flros in my setup, there the highest in the blue spectrum than any other CFL. I used them to veg some of the tightest node spaced plants i ever grew.. scroll down adn check it out.
http://www.sylvania.com/forum/pdfs/faq0041-0800.pdf


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