Light Quantity vs Light Quality Evidence ... Just for 4 u gg lol!

[pop22]

I'm thinking these quantum boards run soft, say 35 watts would be a good replacement for T5s. 65% efficient vs 18-20% for t5.
thats 12.25 watts of heat vs 28watts at the same power level. plus much more light with none of the reflector loses of the T5. I think LED strip lights are about to kill florescent lighting. T5 were great, don't get me wrong, but I think there time is over.

actually they moved on to a cool white/ deep red mix. plant can adapt to their environment and lighting but only test grows will provide accurate results. theory is a good staring point but in the real world often needs adjustment to provide desired outcome."engineers design thing. technicians make them work" I grow with T5s because I don't want to punch holes in my closet for a vent/cooling system and have found that adjusting the spectrum has improved my yield and quality. as a PU MMJ grower these are important to me. commercial growers may have different goals

 

[pop22]

yeah, I would hate to be the guy handling plants all day doing SCROG training......lol! BS! I'd love it! IMO, I'd think they'd accept some labor intensive plant training in exchange for more weight per light. Commercially, its all about how much bud can be grown.

I guess scrog is not an option for large scale commercial growers.too labor intensive but for a small scale PU grower it's a great option. especially in states that have a low limit on the number of plants you can grow.I have done SOG and with a large number of small,short plants penetration is not a problem. as a PU MMJ growers quality is the most important factor to me.for commercial growers it's quantity and this is apparent with the pot sold at dispensaries. takes twice as much dispensary weed to get the job done

 

[frica]

I'm thinking these quantum boards run soft, say 35 watts would be a good replacement for T5s. 65% efficient vs 18-20% for t5.
thats 12.25 watts of heat vs 28watts at the same power level. plus much more light with none of the reflector loses of the T5. I think LED strip lights are about to kill florescent lighting. T5 were great, don't get me wrong, but I think there time is over.

T5 is already dead.

Just get some phillips LED T8.

The Master Ledtube goes up to 148 lm/W. (probably one of the colder colour temps)
http://www.lighting.philips.nl/producten/led-tube.html

And generic cheap led tubes you can get on ebay or whatever are also more efficient than T5.

http://www.lighting.philips.nl/prof/lampen-professioneel/led-lampen/led-tubes/master-ledtube-em-mains/929001239402_EU/product
111 lm/w

The 1500mm 3000k one is 130 lm/w

 

[OneHitDone]

T5 is already dead.

Just get some phillips LED T8.

The Master Ledtube goes up to 148 lm/W. (probably one of the colder colour temps)
http://www.lighting.philips.nl/producten/led-tube.html

And generic cheap led tubes you can get on ebay or whatever are also more efficient than T5.

http://www.lighting.philips.nl/prof/lampen-professioneel/led-lampen/led-tubes/master-ledtube-em-mains/929001239402_EU/product
111 lm/w

The 1500mm 3000k one is 130 lm/w

Get your Philips T8 LED's and meet us over in the Lettuce Grow Challenge thread and show us how dead T5's are :
https://www.rollitup.org/t/all-cob-users-lettuce-grow-challenge.905662/

 

[Yodaweed]

Get your Philips T8 LED's and meet us over in the Lettuce Grow Challenge thread and show us how dead T5's are :
https://www.rollitup.org/t/all-cob-users-lettuce-grow-challenge.905662/

I plan to grow lettuce after this grow of rosemary , lavender , parsley , and sage in my aerogarden that i recently upgraded to have a LED hood , not COB's but a pretty cool setup, i grew rainbow chard outdoors this year and arugala last year outdoors . What varieties of lettuce do you grow?

 

[OneHitDone]

I plan to grow lettuce after this grow of rosemary , lavender , parsley , and sage in my aerogarden that i recently upgraded to have a LED hood , not COB's but a pretty cool setup, i grew rainbow chard outdoors this year and arugala last year outdoors . What varieties of lettuce do you grow?

Several but "Rex" is a superstar for indoor/greenhouse cultivation

What kind of led did you put on the aerogarden? I see they have all the new models that come with led's but wonder how well they work

 

[Yodaweed]

Several but "Rex" is a superstar for indoor/greenhouse cultivation

What kind of led did you put on the aerogarden? I see they have all the new models that come with led's but wonder how well they work

It's the same hood as the new models

Got mostly white diodes in it.

 

[OneHitDone]

It's the same hood as the new models

Got mostly white diodes in it.
View attachment 3862917

How is that combo doing for growing greens?

 

[Yodaweed]

How is that combo doing for growing greens?

Haven't tested on greens yet, growing herbs right now, rosemary, sage and parsley ,also got one lavender plant growing for oil extractions and bath bombs. Next run i plan to do some lettuce , i got the 7 pod unit , so i'd imagine this thing could produce some good salads.

 

[MichiganMedGrower]

I guess scrog is not an option for large scale commercial growers.too labor intensive but for a small scale PU grower it's a great option. especially in states that have a low limit on the number of plants you can grow.I have done SOG and with a large number of small,short plants penetration is not a problem. as a PU MMJ growers quality is the most important factor to me.for commercial growers it's quantity and this is apparent with the pot sold at dispensaries. takes twice as much dispensary weed to get the job done

Dispensary weed is no competition because they will cut early to stay on schedule. And blanket heavy feed all the plants.

My quality and yield have gone up consistently for three years while learning how to grow better.

The new light has made a difference but not as much as proper feeding and care of each plant individually as I do to keep them happy. And working the light to keep them happy as well. The HPS lamps I already had.

And making sure they are truly finished.

Yield and quality are not mutually exclusive. And spectrums effects can have a lot to do with genetics and the original breeders room as well. There are many other variables. Proper nutrition and stable environment seems more important to me than the spectrum.

As far as penetration and the better spectrum. I can see I will be using both types of bulbs evenly when I can add 1 more so the whole room sees the mixed light.

And this is what many quality medical commercial grows are doing.

Also 2 week finishing bulbs are used to great effect. It has been shown that the increase in terps and thc happen with fuller spectrum and uv added only during ripening.

This is how I am using my LEC 315 now. And there is definite improvements.

By the way my plants are trained into 2x2 bushes. The 315 can not penetrate the canopy properly that was grown under the super HPS.

I have a feeling if the plant was always under the LEC and never under the HPS the structure might be different and then the results. Or trained a bit different to compensate.

I am going to keep using both types of bulbs it looks like.

 

[mauricem00]

T5 is already dead.

Just get some phillips LED T8.

The Master Ledtube goes up to 148 lm/W. (probably one of the colder colour temps)
http://www.lighting.philips.nl/producten/led-tube.html

And generic cheap led tubes you can get on ebay or whatever are also more efficient than T5.

http://www.lighting.philips.nl/prof/lampen-professioneel/led-lampen/led-tubes/master-ledtube-em-mains/929001239402_EU/product
111 lm/w

The 1500mm 3000k one is 130 lm/w

funny but for a dead light they are the best selling grow lights on the market. and T5 efficiency is around 30% not the 15-20% the LED crowd claims but false claims are common with LED sellers

 

[MeGaKiLlErMaN]

funny but for a dead light they are the best selling grow lights on the market. and T5 efficiency is around 30% not the 15-20% the LED crowd claims but false claims are common with LED sellers

True, but not from a reputable source. There are leds that are 50-65%efficient so it's all about how much you want to spend really

 

[mauricem00]

True, but not from a reputable source. There are leds that are 50-65%efficient so it's all about how much you want to spend really

it's also about quality of product.to get the kind of efficiency that come close to what you are claiming is very expensive I tried cree 3070 and vero 18s in a test grow and the yield was about the same for the same input power but the quality was not there.tried LED light bulbs in my home and went back to CFL after 6 month because 20% of the LED light bulbs had already failed.I wish that LEDs worked better but I have not seen it and the folks at home depot tell me other customers are having the same experience.maybe these new low power SMDs from samsung and bridgelux are better but only time will tell.i've wasted too much money on LEDs to take another chance.may try CMH when the price comes down and better ballast become available

 

[MeGaKiLlErMaN]

it's also about quality of product.to get the kind of efficiency that come close to what you are claiming is very expensive

True but the lights of this caliber last for around 100,000 hours... So it's well worth it long term

 

[mauricem00]

led light bulbs claim a life expectancy of 50000 hours as do the LED used in cheap LED grow lights but the reality is very different.my mars hydro started loosing diodes in the first month and LED light bulbs from home depot had a 20% failure rate in the first 6 month.it will take 20 years to find out if your claims are true if you run 12/12

 

[MeGaKiLlErMaN]

led light bulbs claim a life expectancy of 50000 hours as do the LED used in cheap LED grow lights but the reality is very different.my mars hydro started loosing diodes in the first month and LED light bulbs from home depot had a 20% failure rate in the first 6 month.it will take 20 years to find out if your claims are true if you run 12/12

Why would I talk about the lesser lights like Mars? I'm talking quality that costs money. COBs are the only tech that's really with the cash. And they will easily last 50,000. hours, and past 100,000 if you run them at a good spot, it's all in the papers with a curve to tell you at what current/ heat how long they will run.

Exactly I'll wait the 15-20 years (full cycle lights)

 

[Olive Drab Green]

Here's 241w of TastyLED COB fixtures. 2x Cree 3590s (3500k/80 CRI) driven at 2150mA each, 1x Seventh Gen Vero29C (3500k/90 CRI.) driven at 1670mA. 4 weeks 6 days in. Large golfball sized nugs so far, and we are still 4-6 weeks from Harvest.

Lemon Garlic OG
by Humboldt Seed Organization


RG#357 (Colorado Thunder Fuck)
by @RM3

 

[Stephenj37826]

funny but for a dead light they are the best selling grow lights on the market. and T5 efficiency is around 30% not the 15-20% the LED crowd claims but false claims are common with LED sellers

No T5 is not 30% efficient.



13.3% Sphere verified

 

[Olive Drab Green]

Two more:

 

[mauricem00]

No T5 is not 30% efficient.

View attachment 3863077

13.3% Sphere verified

silvania claims 3.21 watts per 1000 lumens for their 6500k and 3.69 watts per 1000 lumens for their 5000k bulbs. at 5000 lumens for a 54 watt bulbs this equals 16.05 and18.45 watts of radiant power for a 54 watt bulb or 29.72 and 34.17 percent respectably. G.E publishes similar numbers. either these large companies are lying or the LED makers are making false claims about T5s to make their lights look better.using a commercial grade ballast with a ballast factor of 1.0 a 6 tube lamp draws 324 watts from the wall and produces 30000 lumens.do the math