How to Grow Tobacco

How to grow and process tobacco at home for personal use. This is a non-commercial hobby website.
Tobacco Picture Gallery Click Here
It is currently Fri Nov 24, 2017 11:18 am

All times are UTC - 8 hours [ DST ]




Post new topic Reply to topic  [ 41 posts ]  Go to page Previous  1, 2, 3
Author Message
 Post subject: Re: Indoor experiment with red/blue LEDs
PostPosted: Thu Jan 12, 2012 2:44 pm 
Offline
User avatar

Joined: Wed Feb 02, 2011 9:51 pm
Posts: 1130
Location: near Blacksburg, VA
Here is a page of information specifically on grow lights:

http://www.littlegreenhouse.com/guide3.shtml

Bob


Top
 Profile  
 
 Post subject: Re: Indoor experiment with red/blue LEDs
PostPosted: Thu Jan 12, 2012 3:22 pm 
Offline

Joined: Thu Aug 26, 2010 9:40 pm
Posts: 667
Location: The Real Columbia River Gorge in Skamania County Southern Washington State Member # 1439
Yeah that's the same site I saw earlier. I posted it just now on the first page of this thread.
It has that T5 bulb or " Lamp " that I bought, for 5 cents less.
Not including shipping of course.
That light I bought lights up the entire living room at night it puts out a lot of light.


Top
 Profile  
 
 Post subject: Re: Indoor experiment with red/blue LEDs
PostPosted: Fri Jan 13, 2012 12:49 am 
Offline
User avatar

Joined: Sun Dec 18, 2011 2:15 am
Posts: 56
Location: Maribor, Slovenia
Quote:
That light I bought lights up the entire living room at night it puts out a lot of light.


I suggest you do the same thing I did, make some reflective container and put everything in! And there is another advantage with that, you can keep a bit higher temperature in there.


Top
 Profile  
 
 Post subject: Re: Indoor experiment with red/blue LEDs
PostPosted: Fri Jan 13, 2012 3:27 am 
Offline

Joined: Thu Aug 26, 2010 9:40 pm
Posts: 667
Location: The Real Columbia River Gorge in Skamania County Southern Washington State Member # 1439
I am going to today, yesterday I dug up some of my soil from my tobacco patch and have it inside
to thaw out it was like a iceberg.
I'm going to start off with some tomato and Pepper plants on the 15th of January then towards the
1st of April I'll start my Tobacco seeds


Top
 Profile  
 
 Post subject: Re: Indoor experiment with red/blue LEDs
PostPosted: Fri Jan 13, 2012 4:23 pm 
Offline

Joined: Wed Sep 01, 2010 9:10 pm
Posts: 89
Location: Philadelphia, Pa.
I can't see the lights being that far away. I would think that you would have to bring the in closer and add more lights.
From what I understand light is an inverse proportion... If you go twice as far away, you only get 1/4 of the lumens.
Also, what's with the tin foil? Yeah, it's shiny but I think that it only reflects about 70% of the light. Flat white paint is the next best thing to mylar. (90-95% reflectivity for the paint).


Top
 Profile  
 
 Post subject: Re: Indoor experiment with red/blue LEDs
PostPosted: Sat Jan 14, 2012 1:58 am 
Offline
User avatar

Joined: Sun Dec 18, 2011 2:15 am
Posts: 56
Location: Maribor, Slovenia
Quote:
I can't see the lights being that far away. I would think that you would have to bring the in closer and add more lights.
From what I understand light is an inverse proportion... If you go twice as far away, you only get 1/4 of the lumens.
Also, what's with the tin foil? Yeah, it's shiny but I think that it only reflects about 70% of the light. Flat white paint is the next best thing to mylar. (90-95% reflectivity for the paint).


As to lights, what you wrote is true if you have a one point source of light, and its radiating all around. These LEDs are more like laser, the light is focused. You put them so that you get optimum light discount. Only grow area is covered, not much losses there.

Regarding foil, according to many sources its reflectivity is around 85%+, more than enough. Its a good one, looks like a mirror. White paint, on the contrary, gives you reflection of up to 85% if its really white, totaly smooth and glossy. Thats what my research showed. Forget about white paint reflecting 95%, that is only the theory.

Mylar is the best, but aluminium foil is doing good job as well.


Top
 Profile  
 
 Post subject: Re: Indoor experiment with red/blue LEDs
PostPosted: Mon Jan 16, 2012 2:28 am 
Offline
User avatar

Joined: Sun Dec 18, 2011 2:15 am
Posts: 56
Location: Maribor, Slovenia
Okay, as promised, picture after a week:

Image

As you can see, for some reason my plants started to grow like crazy! :D

So, are LEDs any good?

Advantages:
+Low power consuption compared to everything else
+They obviously work well
+Heat is no issue
+Long life (up to 5x CFL)

Disadvantages:
-Expensive ($3/W compared to CFLs $0,2-0,4/W)
-Really annoying light if you have to look at it all the time
-My lights need high mounting
-No heating is sometimes a disadvantage if you want higher temperature

Conclusion: LEDs have a great potential, but they are not there yet. I'd advise you to stick to CFLs at this moment, but keep an eye our for LED. This tehnology is very promising and will be the light of choice in few years, when prices fall.

I will rather use CFLs in my room from now on, and use LEDs somewhere where I don't have to look at them. :wink:


Top
 Profile  
 
 Post subject: Re: Indoor experiment with red/blue LEDs
PostPosted: Sun Jan 22, 2012 8:28 am 
Offline

Joined: Thu Aug 26, 2010 9:40 pm
Posts: 667
Location: The Real Columbia River Gorge in Skamania County Southern Washington State Member # 1439
A one watt led light bulb 42 dollars It better last 42 years at that price

Image


Top
 Profile  
 
 Post subject: Re: Indoor experiment with red/blue LEDs
PostPosted: Tue Apr 24, 2012 7:07 am 
Offline

Joined: Thu May 05, 2011 1:35 am
Posts: 39
LED's are great for growing except the price. Some sites are so expensive you're talking $1,000's of U.S.D.'s I'll wait until the price drops down in a couple of years.


Top
 Profile  
 
 Post subject: Re: Indoor experiment with red/blue LEDs
PostPosted: Tue Apr 24, 2012 8:24 am 
Offline

Joined: Mon Feb 16, 2009 9:10 am
Posts: 266
Location: Eastern MA, USA
If you're lucky, you can buy LED's very cheaply. Go to your local box store sometime in late December and early January, and look for heavily-discounted strings of LED Christmas lights. Saw them one year at $2 for a 100-light string, and like an idiot, it didn't occur to me to buy them (to be fair, was doing my last-minute (aka only) Christmas shopping, so I had other things on my mind...)

-RSF


Top
 Profile  
 
 Post subject: Re: Indoor experiment with red/blue LEDs
PostPosted: Tue Apr 24, 2012 9:08 am 
Offline
User avatar

Joined: Sun Dec 18, 2011 2:15 am
Posts: 56
Location: Maribor, Slovenia
I dont think those christmass tree lights would be good for growing to be honest, its all about the right wavelenght. I think I'll just use a combination of CFL and LED next year, If I do any indoor growing.

Still can't beat the sun though :)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 41 posts ]  Go to page Previous  1, 2, 3

All times are UTC - 8 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group