LED Growlights… experience, anyone? - Page 3

JuniPerez · 01-17-2012, 07:33 AM

Quote:

Originally Posted by harveyc

I don't recall the precise details, but he mentioned that LED output dropped significantly after something like a year.

I had read that they lose half their brightness after about 5 years of constant 24hr/day use. CFL's supposedly lose 20-40% by the end of their lifespan. Maybe this will improve?

Richard · 01-17-2012, 11:23 AM

Quote:

Originally Posted by JuniPerez

I had read that they lose half their brightness after about 5 years of constant 24hr/day use. CFL's supposedly lose 20-40% by the end of their lifespan. Maybe this will improve?

I prefer the 4' fluorescent tubes (6500K, high output) to the compact fluorescent (CFL) bulbs for indoor plant growth. However, the CFL's would be great for a batch of seedlings.

Richard · 01-17-2012, 02:20 PM

(Following up on a PM question from Harvey)

Regardless of the kind of light you choose, keep the following in mind:

Lumens is a measure of the perceived coherency of light on a surface. It does not depend directly upon energy imparted to the surface.

Photosynthesis depends directly upon the energy (watts x seconds) of light in the "plant spectrum" (6500K black body) imparted to the surface. It does not depend upon lumens.

sunfish · 01-17-2012, 02:57 PM

Quote:

Originally Posted by Richard

(Following up on a PM question from Harvey)

Regardless of the kind of light you choose, keep the following in mind:

Lumens is a measure of the perceived coherency of light on a surface. It does not depend directly upon energy imparted to the surface.

Photosynthesis depends directly upon the energy (watts x seconds) of light in the "plant spectrum" (6500K black body) imparted to the surface. It does not depend upon lumens.

Watt ?

sunfish · 01-17-2012, 03:23 PM

Lumens=a measure of the total "amount" of visible light emitted by a source.

harveyc · 01-17-2012, 11:36 PM

Watt? My only reference to lumens was in reference to my flashlight. I only use my flashlight to emit light which I can see so that I can find my way around my fields, etc. I have not tried growing plants using flashlights and don't anticipate doing so.

I'm still looking for a reference/link to a source of some light I can use to cover a 2' x 4' area.

harveyc · 01-23-2012, 03:08 PM

Quote:

Originally Posted by harveyc

I'm still looking for a reference/link to a source of some light I can use to cover a 2' x 4' area.

Watt the heck, I settled on http://www.amazon.com/HydroFarm-FLT4...ef=pd_sbs_ol_1 which should get here on Wednesday. Seems good enough.

sunfish · 01-23-2012, 03:15 PM

Quote:

Originally Posted by harveyc

Watt the heck, I settled on http://www.amazon.com/HydroFarm-FLT4...ef=pd_sbs_ol_1 which should get here on Wednesday. Seems good enough.

I would think that would work PRETTY GOOD. Wish I had one.

venturabananas · 01-23-2012, 09:12 PM

Quote:

Originally Posted by harveyc

Watt the heck, I settled on Amazon.com: HydroFarm FLT48 Commercial System Grow Light Fixture: Home & Garden which should get here on Wednesday. Seems good enough.

For my more modest needs, I got this one last year. It seemed fine, the plants grew and seemed happy enough, though without any reference for comparison, I have no idea how good it is.

Amazon.com: Hydrofarm JSV4 4-Foot Jump Start T5 Grow Light System: Home & Garden

David Harritz · 06-01-2012, 01:38 PM

I am using the led grow lights at present and are working very well for me. It is giving great results to me and the plants are growing very well. If the led light do not suit you than there are other options like the fluorescent lights.

coronelcarina07 · 09-27-2013, 02:00 AM

You can have more options at Grow Blu

Abnshrek · 09-27-2013, 04:21 AM

Quote:

Originally Posted by coronelcarina07

You can have more options at Grow Blu

You can probably burn your place down too.. :^)

01-17-2012, 02:20 PM	#43 (permalink)
Richard un-Retired Richard's Photo Gallery Location: Vista, CA Find me on the map! Zone: USDA 10b Name: Richard Join Date: Jan 2008 Posts: 9,674 BananaBucks : 755,565 Feedback: 9 / 100% Said "Thanks" 3,636 Times Was Thanked 12,537 Times in 4,719 Posts Said "Welcome to Bananas" 1,685 Times	Re: LED Growlights… experience, anyone? (Following up on a PM question from Harvey) Regardless of the kind of light you choose, keep the following in mind: Lumens is a measure of the perceived coherency of light on a surface. It does not depend directly upon energy imparted to the surface. Photosynthesis depends directly upon the energy (watts x seconds) of light in the "plant spectrum" (6500K black body) imparted to the surface. It does not depend upon lumens. __________________ Back in business at plantsthatproduce.com Last edited by Richard : 01-17-2012 at 02:25 PM. Reason: x

01-17-2012, 03:23 PM	#45 (permalink)
sunfish Banned sunfish's Photo Gallery Location: San Diego Find me on the map! Zone: 9-11 Name: Tony Join Date: Apr 2008 Posts: 18,429 BananaBucks : 1,278,423 Feedback: 8 / 100% Said "Thanks" 3,210 Times Was Thanked 20,593 Times in 7,760 Posts Said "Welcome to Bananas" 2,716 Times	Re: LED Growlights… experience, anyone? Lumens=a measure of the total "amount" of visible light emitted by a source.

01-17-2012, 11:36 PM	#46 (permalink)
harveyc Been nuts, gone bananas harveyc's Photo Gallery Location: Isleton, Calif Find me on the map! Zone: 9b Name: Harvey Join Date: May 2007 Posts: 5,119 BananaBucks : 363,943 Feedback: 5 / 100% Said "Thanks" 6,025 Times Was Thanked 4,460 Times in 1,896 Posts Said "Welcome to Bananas" 1,785 Times	Re: LED Growlights… experience, anyone? Watt? My only reference to lumens was in reference to my flashlight. I only use my flashlight to emit light which I can see so that I can find my way around my fields, etc. I have not tried growing plants using flashlights and don't anticipate doing so. I'm still looking for a reference/link to a source of some light I can use to cover a 2' x 4' area. __________________

06-01-2012, 01:38 PM	#50 (permalink)
David Harritz hydroponics Location: USA Join Date: Jun 2012 Posts: 13 BananaBucks : 2,186 Feedback: 0 / 0% Said "Thanks" 0 Times Was Thanked 2 Times in 2 Posts Said "Welcome to Bananas" 1 Times	Re: LED Growlights… experience, anyone? I am using the led grow lights at present and are working very well for me. It is giving great results to me and the plants are growing very well. If the led light do not suit you than there are other options like the fluorescent lights. __________________ Find the LED Grow Lights easily

09-27-2013, 02:00 AM	#51 (permalink)
coronelcarina07 Join Date: Jun 2013 Posts: 6 BananaBucks : 566 Feedback: 0 / 0% Said "Thanks" 0 Times Was Thanked 1 Time in 1 Post Said "Welcome to Bananas" 0 Times	Re: LED Growlights… experience, anyone? You can have more options at Grow Blu

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