LED GROW TEST. 126W hydro grow led VS. 180W pro source LED LIGHT

[WarBux]

irishboy thanks for doing this test. It really shows the performance of the two lights in question. You obviously know how to grow. I would have really liked to see you do a control group with some T5s for reference.

Hey if anyone wants to see another test using HGL lights go check out 420magazine.com and look for a user called ledtester. The test ran 378 led watts from HGL against 1000w HPS. Thats all Im going to say on that note, you can see the results for yourself

Yea that grow really sums it up. I am still waiting for ledgirl to comment on why my grow w/ 252w of LED in a 16 cubic foot tent @ week 6 is as far behind as it looks to be.

 

[Skip]

Yea that grow really sums it up. I am still waiting for ledgirl to comment on why my grow w/ 252w of LED in a 16 cubic foot tent @ week 6 is as far behind as it looks to be.

Roots too cold? This seems to be a common problem cropping up for LED grows.

 

[dogsnova]

Hey if anyone wants to see another test using HGL lights go check out 420magazine.com and look for a user called ledtester. The test ran 378 led watts from HGL against 1000w HPS. Thats all Im going to say on that note, you can see the results for yourself

Verry interesting results I must say. Thanks for the heads up.

 

[Bionic]

I think there are a lot of trees getting lost in this forest of doubt. The first - and foremost - issue was the disbelief associated with the premise that you can grow marijuana using arrays of LED lights. The efficacy of LEDs was the primary debate and the primary reason for the distribution of these lights to independent growers to test.

The issue of which vendor provides the product with the best benefits is starting to look like it will create a smokescreen that will result in the central issue being tossed to the side.

The market will settle which vendor offers the best overall value in growing technology. As far as this kid is concerned, the premise of growing marijuana using LEDs in place of other forms of technology (or as augmentation) appears to be a concept that has strong proof to sustain it.

That should be our focus and that salient fact suggests the practice of growing marijuana indoors is about to change in a very big way.

Those who complain about the cost of one vendor's unit versus another vendor's unit will see their complaint sustained by the market or proven to be just a complaint.

The takeaway here is that the technology is a provable winner and that appears to be beyond the reasonable doubt of reasonably conservative minds.

Hey MPD. I agree with you but I would like to say that there is nothing wrong with people bringing up the fact that certain claims were made. I think a lot of people are being premature in making up their minds before the grows are completed but such is the way of the times. LOL. Bottom line is that, ONCE THE TEST GROWS ARE COMPLETED, people SHOULD hold the manufacturer or retailer to their claims. This benefits everyone involved including the retailer. Adjustments can be made and a better product can be produced. Then other companies can compete and the world benefits. This is all a necessary part of the evolutionary process. BUt you're right. The take-home message is that LEDS can and do work at growing marijuana but the proof of the pudding will be in the tasting. Smoke reports will tell still another part of the story.

 

[mpd]

Oh, I don't have any doubts about the smoke test. I am of the opinion (and god let it be a humble thing) that if the biology works at the cellular level and the plant can grow and form buds, plants will deploy whatever defense mechanisms are available to them to ensure survival. In the case of this particular plant I think it would be safe to say the resin will form and the contents of that resin will include certain chemicals we find rather interesting.

Bottom line: if photosynthesis takes place (and it appears that is what is happening) I think the smoke test will be okay.

Time will tell, but I don't expect surprises in that regard.

 

[WarBux]

Roots too cold? This seems to be a common problem cropping up for LED grows.

I suspect its the light lol but thats an interesting theory. Were do you suggest the roots be at for led, I have a chiller and heater setup I will dial it in and see if that helps.

 

[overmyhead]

First off, I cant say thanks enough to folks like Irish taking their time to do this for our benefit and for vendors like ledgirl for facilitating it in whatever capacity.

I'm not that smart - definitely not a physicist but would 1000w of led light put out less heat overall than 1000w of hps. I would love to see temp comparisons side by side. The reason I ask this is that even if led can get the same per watt yield but with 50% less overall heat - then it opens up the world of growing to a lot of people who otherwise wouldnt be able to because they just can't deal with the heat (don't want to cut holes in walls etc. Or, it might allow someone with a small sealed space to take advantage of co2 without too much hassle. Just a thought that's all - so that would be a great test for any of you that have led's and hps/mh. Like you led girl, just in a spare bedroom I'd like to see the temp after a hid's been running for say 2 hours and then the same (or close to it) wattage in leds. Just a thought.

Also, what about the long term savings on replacing bulbs.

 

[Skip]

I suspect its the light lol but thats an interesting theory. Were do you suggest the roots be at for led, I have a chiller and heater setup I will dial it in and see if that helps.

In your other post you say you need to chill the roots if the room is over 90 degrees, but using LEDs, your room stays under 90 degrees so why are you chilling the water?

Growers need to adapt to the new lighting and temperature conditions of LED. You can't expect the plants to thrive under the conditions of other lighting systems when you have substantially changed the conditions of the grow using LEDs. I keep seeing the same slow grow problem with LED grows where ppl say the temps are under 70.

I'm not an expert grower, I'm just sayin' what should be obvious.

 

[S_a_H]

In your other post you say you need to chill the roots if the room is over 90 degrees, but using LEDs, your room stays under 90 degrees so why are you chilling the water?

Growers need to adapt to the new lighting and temperature conditions of LED. You can't expect the plants to thrive under the conditions of other lighting systems when you have substantially changed the conditions of the grow using LEDs. I keep seeing the same problem with LED grows where ppl say the temps are under 70.

I'm not an expert grower, I'm just sayin' what should be obvious.

I realized this right off and started telling people to use a heat mat or seedling mat.

Now I am lucky enough to have three units running so my area is a pretty steady 80 degrees. So then I placed a thermometer under my pots for a couple hours and then checked it and it was only about 5 degrees less.

S_a_H

 

[WarBux]

In your other post you say you need to chill the roots if the room is over 90 degrees, but using LEDs, your room stays under 90 degrees so why are you chilling the water?

Growers need to adapt to the new lighting and temperature conditions of LED. You can't expect the plants to thrive under the conditions of other lighting systems when you have substantially changed the conditions of the grow using LEDs. I keep seeing the same slow grow problem with LED grows where ppl say the temps are under 70.

I'm not an expert grower, I'm just sayin' what should be obvious.

WTF are you talking about? I had to add the chiller because the ambient temps in the tent were too high. My room stays at 85-95 during the day. I am chilling the water because a reservoir over 72 degrees is asking for root rot. Where do you get temps under 70. With 1 LED in that tent the temps were steady @ 80-84 with 2 they shoot up to around 90. Its only 16 cubic feet. 252w in a 16 cu area is going to produce heat.

I realized this right off and started telling people to use a heat mat or seedling mat.

Now I am lucky enough to have three units running so my area is a pretty steady 80 degrees. So then I placed a thermometer under my pots for a couple hours and then checked it and it was only about 5 degrees less.

S_a_H

again I am growing in a 16 cu area. 1 126w light kept that tent in the low 80s 2 brought it up to 90s.

 

[mpd]

This means the premise of the "sealed growing environment" is not sustainable. The heat from the lights is significant enough that it will have to be piped out of the box. That means you can't get away from ventilation and air filtration. Noise abatement measures and odor filtration equipment will have to be used.

On the other hand, a 3" to 6" offset means the lights can be potentially used in cabinets and other growing environments that have certain height restrictions that would make the requirement of 10" to 18" offsets a real issue.

This gets more interesting and more interesting...

 

[PetFlora]

mpd Not sure what you are driving at. All grows need fresh air to be circulated around the plants, or else mold will have a field day. Plus, plants will benefit by having air blowing around the bottom to help their stalks grow strong and to remove dead air pockets.

Larger watt LED transformers give off some heat, but that heat
is drawn out of the top side via built-in fans, as opposed to burning down on the canopy, ala HPS/HID.

If it's a small closet, you will need to cut a hole and mount a small fan high up on the drywall (or the ceiling), to vent the 'hot' air out, into the area behind/above. You may also need a carbon scrubber for odor control.

 

[GreenThumbBumb]

I have my 126 in a 4sqft cab, without exhaust temps get 83-85, with exhaust its 77, the plants are doing better with the exhaust off.

 

[Hank_Moody]

Scoobie's over at 420 mag has been the nicest, imho. should be on that list. mind, his grow isn't complete either. =)

A little humbled seeing this post. That's mine. I have to admit though I've had issues from the start through the end that are beginner grower mistakes. Too many to name. I also have pictures of one cfl plant that has my largest buds. I look at my grow as the minimum a grower should be able to yield with these LED lights. Proof will start to come in in the next week as 2 plants have all white trichs as of a few days ago.

- definitely not a physicist but would 1000w of led light put out less heat overall than 1000w of hps.

All I can give you is the opinion of the person who ran the 378w HGL-led vs. 1000w hps test. His OPINION was that 1000w vs 1000w would give off the same heat. No science or testing behind that.



Cheers irish.

 

[hades1988]

guessing the 180 will produce in between 3-4 oz... well i hope

 

[PetFlora]

I got 4+ ozs wet and 1.4 dry from a one plant that had almost no side branching.

I used one UFO 90

It was my first DWC grow

and I made a ton of mistakes

 

[Mr.Meds]

 

[apollonio]

any updates irish?? LEDgirl?

 

[WarBux]

mpd Not sure what you are driving at. All grows need fresh air to be circulated around the plants, or else mold will have a field day. Plus, plants will benefit by having air blowing around the bottom to help their stalks grow strong and to remove dead air pockets.

Larger watt LED transformers give off some heat, but that heat
is drawn out of the top side via built-in fans, as opposed to burning down on the canopy, ala HPS/HID.

If it's a small closet, you will need to cut a hole and mount a small fan high up on the drywall (or the ceiling), to vent the 'hot' air out, into the area behind/above. You may also need a carbon scrubber for odor control.

Hes talking about venting the air out. You dont need to vent air out to circulate the air. Lots of people (myself included) were hoping the LEDs would allow one to build a CGE without needing the extra air conditioner.

This means the premise of the "sealed growing environment" is not sustainable. The heat from the lights is significant enough that it will have to be piped out of the box. That means you can't get away from ventilation and air filtration. Noise abatement measures and odor filtration equipment will have to be used.

On the other hand, a 3" to 6" offset means the lights can be potentially used in cabinets and other growing environments that have certain height restrictions that would make the requirement of 10" to 18" offsets a real issue.

This gets more interesting and more interesting...

Ya the offset is similar to CFLs and so is the heat output. Flowering ability seems about on par with the CFL too.

 

[irishboy]

here are some pics the day before 8 weeks.