LED light question

Odin*

Odin*

Well-Known Member
@Heil Tweetler more airy hairy buds. You're trying to prove that LED's/COB's are capable of fascilitating successsful monster grows, and you post this shit. Please.



As I was saying and @Heil Tweetler is displaying, LED's/COB's are just fine for a little closet/tent grow, but they're not a viable light source for large plants/grows. I've been to a few warehouse grows "powered" by LED's/COB's and have yet to see plants worth mentioning. The last LED spot I visited was just over a month ago. Scraggly 3'-4' plants, several strains (GG4, GSC, SFV OG), just under 500 plants (per room). They're using the Spydrx by Fluence. Quality was sub par (with room to improve), the yield was depressing (it just finished, I can get numbers within the week (if they have enough hands, unless they break out the machine, which they might do considering how shitty it already is).



My intent is not to knock the lights, they may very well be "the future", but they aren't "there" yet. Good for a few small plants in a closet and not much more than that.
 
Odin*

Odin*

Well-Known Member
dagwood45431 said:
I've got no dog in this fight, I just didn't understand why he expected a peaceful float down the lazy river after coming in so hot like that.
Click to expand...

You must have missed the last LED thread that was turned upside down by H Twit. He attacked everyone that didn't praise LED/COB. This seems to be the common reaction from the thin skinned fragile ego's that we have left here (after the brief "hiatus"). Take a look around, mostly in the "seeking help" threads. I did not shit all over anyone that voiced an opinion, in a cordial manner, that differed from my own (e.g.; @ttystikk ).

Speaking of... Thai, please shoot me those pics.


Back on topic, there isn't any way to equate LEDw to HPSw as each produces different growth/flowers. Different light source, different outcome. Ever veg under HPS in place of MH? Less vertical growth, wider, short fat bushes. Branching was closer to 90 degree horizontal growth VS the 45 (toward the light) that MH produces (for most plants). I did not note whether or not there was a change in flower development after vegging under HPS. I don't veg under HPS, just an expirement (I prefer the MH results). I do add MH to bloom, 1/3, 1/4, room/strains dependent.
 
Solo0420

Solo0420

Well-Known Member
20170804_094714.jpg Can anyone tell me if this will work till next Wednesday 8 plants under 600watt led in a 4x4x7 or should i fold down my t5s 4x8 till my other 2 leds come Wednesday 20170804_102737.jpg
 
Heil Tweetler

Heil Tweetler

Well-Known Member
Odin* said:
You must have missed the last LED thread that was turned upside down by H Twit. He. attacked everyone that didn't praise LED/COB. This seems to be the common reaction from the thin skinned fragile ego's that we have left here (after the brief "hiatus"). Take a look around, mostly in the "seeking help" threads. I did not shit all over anyone that voiced an opinion, in a cordial manner, that differed from my own (e.g.; @ttystikk ).
Click to expand...
Babbling jackass, I attacked no one. I confronted your defiant ignorance and bloated self importance. Your response is primal screams, an insecure man who is in way over his head.

You did not tag me this time fearful of having your witless ass slapped back to struggleville. Impotent coward.
 
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ttystikk

ttystikk

Well-Known Member
The OP wanted some straightforward, unbiased information- not opinion- about the setup and operation of LED lighting and @Odin* and @Heil Tweetler got so wrapped up in your shit flinging contest that you ruined it for him.

Nobody gives a shit what either of you THINK about the tech, he just wanted some answers.

He deserves an apology from both of you. Let's see if either of you are man enough to admit that you owe him one and step up.
 
BobCajun

BobCajun

Well-Known Member
I read an experiment involving supplemental light in a greenhouse growing lettuce. They used equal amounts of light from red and blue LEDs and from HPS. They got 6% more dry weight with the HPS than blue LEDs and 17% more than red LEDs. Oddly, they didn't try white LEDs. The infrared heat from the HPS may have been a factor though, since it was a greenhouse, which tend to be cool much of the time. The article doesn't necessarily prove anything but I found it interesting nonetheless.

LEDs are good but the problem is the drivers are expensive and burn out after a couple years, at least my Cree ones did, one of two. I stopped using them both after the one burnt out and went to using HPS with a few LED bulbs to fill out the spectrum. The bulbs are cheap enough that burnouts aren't a major problem. Getting new LED drivers? Pretty problematic. They don't sell them in hardware stores. Granted they might last longer with good heat removal, mine was just sitting out. Who does that though, put special heat sinks on drivers?
 
Heil Tweetler

Heil Tweetler

Well-Known Member
ttystikk said:
The OP wanted some straightforward, unbiased information- not opinion- about the setup and operation of LED lighting and @Odin* and @Heil Tweetler got so wrapped up in your shit flinging contest that you ruined it for him.

Nobody gives a shit what either of you THINK about the tech, he just wanted some answers.

He deserves an apology from both of you. Let's see if either of you are man enough to admit that you owe him one and step up.
Click to expand...
Bro your sanctimonious rant sounds like a plea for Jr moderator status.

If your stressed over this thread take a seat and chill. Here's a trumplug to help you chillax.

o-TRUMP-BUTT-PLUG-570.jpg
 
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GrowLightResearch

GrowLightResearch

Well-Known Member
Odin* said:
There is not a direct comparison. LED's/COB's are sufficient in smaller grows w/smaller plants. They will not produce the same plant (by height) that an HPS can. There is not any benefit to quality either ("mythology" perpetuated by closet growers).
Click to expand...
A photon is a photon. All photons travel at the speed of light. Whether the photon comes from an HPS or an LED is and the height is of no consequence. The density of the light affects the number of photons per second for a given area.

In horticulture the number of photons, in µmoles, per square meter per second is the standard measurement. Plants use photons regardless of the energy the photon carries and this is why a quantum measurement is used.

200 high quality 3 watt (200 x 1amp x 3.0v) will produce more photons per second than a 1000W HPS. This was proven by Cree with their Horticulture Reference Design compared to a Gavita Pro HPS 1000W.

Photon output can be produced and measured in many ways. There are LED fixtures (e.g. Heliospectra) that do a better job than HPS. Higher photon output, adjustable spectrum, and better uniformity. High price tag, lower operating costs. Superior to HPS.

Then there are the cheap inefficient fixtures with inefficient LEDs, inefficient power supplies, poor thermal management, and poor uniformity. Low price tag with high operating costs. Inferior to HPS.

When a vendor compares their photon output to HPS in watts, they are more often than not, lying. Example 600W HPS equivalence with 120 five watt LEDs.

There are those that evaluate a fixture by the wall watt draw. These cheap fixtures can draw twice the current and output half the photons as another fixture with the same wall watt draw. The efficiency of the LEDs 30% cheap Chinese - 80% Cree XP-3G) and power supply range from 70% Cheap Chinese to 95% Mean Well. As long as buyers use wall watts to compare the low efficiency parts will continue to be used.

This fixture below has 132 of the cheap inefficient LEDs so called 5 watt. But the watt rating of an LED does not equal forward voltage x current. White and blue have are about 3v and red and yellow have about 2v forward voltages. The estimated total forward voltage here is 320v. The LEDs are powered by four 70v-90v, 500mA LED drivers. Divide 320v by 4 = 80v. But the brightness of a quality Cree or Lumiled white is many times brighter.



When I see a board that looks like this, it's just a waste of electricity.

This board has four columns of white LEDs (the yellow phosphor LEDs).


4-ledDriver500mAeach.jpg



The brightness of the LED is very dim compared to top tier LEDs.
This board could NEVER compete with HPS.
Notice the photo of white LEDs below this one was taken with the same camera at 500mA.

128CheapLEDs.jpg


The white above and below, are night and day. 200 of the LEDs below would beat HPS.

32WhiteLEDs.jpg



Cheap LED drivers

fansDrivers.jpg
 
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