Bridgelux EB-series on a 2' x 4' SCROG

graying.geek

Well-Known Member
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Like most rookies, it seemed simple, right? I ordered 2 Viparspectra 300w units from Amazon, bought Dr. Jacks Classic and Bloom and a couple other chemical nutes, mixed up some super soil, and popped a couple fem Northern Lights seeds.

For a first time grow it went relatively well. A few beginner problems with watering and nute schedule, but nothing consequential. I SCROGed the 2 plants in a 2’ x 4’ grow room and ended up with 8 oz of airy buds of low potency.

Genetics, no doubt, had a large part to play in the mediocre bud quality but after doing quite a bit of research, I decided to make a couple of other changes for my next grow. First, I switched to organic nutes. Just seems more straightforward and responsible – sustainability and all – and it’s working well. My plants filled out the SCROG nicely and have shown no sign of nute problems.

The second change was to my lighting. I posted an inquiry here as to the poor quality of my buds and the common themes amongst the limited responses were: 1) lighting, and 2) genetics. So, I decided to build some arrays using the Bridgelux EB-series strips and I’ve relegated the 300w units to cloning and seed production in other rooms. I went with 8 x BXEB-L1120Z-40E4000-C-A3 strips (1120 mm, 4000’k) each mounted on a 48” length of angle aluminum and driven by 2 Mean Well HLG-185H-C1050A drivers.

I can post a detailed parts list with cost, source, and photos if anyone’s interested. Just ask.

These suckers are sweet! Bright as hell and very efficient. Running the drivers at 100% the temps directly on the strips are 23’C, the top surface of the angle aluminum is 25’C. The drivers run pretty hot: ~45’C, but well within operating temps. I an also lower the light to within a cm of the tops – the plants won’t get burned unless a leaf or top actually touches one of the LED bulbs for an extended period. And the coverage is amazing.

So back in late April I put 3 1-month old clones from my first Northern Lights grow under these new lights and let ‘em veg for another month on the 18/6 schedule before flipping them to 12/12 on May 23.

Here they are at the flip:

IMG_20170524_163923506.jpg

And today, at the beginning of week 5:

IMG_20170620_093521030.jpg

IMG_20170620_093534037.jpg

I have to say, at the outset I was skeptical re: these lights, but as the girls progress into full bloom, I’m becoming more optimistic. The plants have finished their stretch and the copious buds are filling in and thickening nicely.

This is my second grow, so please chime in if you spot anything amiss or if you have any experiential advice. I’ll continue to post updates through harvest.
 

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BuddyColas

Well-Known Member
@Page { margin: 0.79in } p { margin-bottom: 0.1in; line-height: 120% }

Like most rookies, it seemed simple, right? I ordered 2 Viparspectra 300w units from Amazon, bought Dr. Jacks Classic and Bloom and a couple other chemical nutes, mixed up some super soil, and popped a couple fem Northern Lights seeds.

For a first time grow it went relatively well. A few beginner problems with watering and nute schedule, but nothing consequential. I SCROGed the 2 plants in a 2’ x 4’ grow room and ended up with 8 oz of airy buds of low potency.

Genetics, no doubt, had a large part to play in the mediocre bud quality but after doing quite a bit of research, I decided to make a couple of other changes for my next grow. First, I switched to organic nutes. Just seems more straightforward and responsible – sustainability and all – and it’s working well. My plants filled out the SCROG nicely and have shown no sign of nute problems.

The second change was to my lighting. I posted an inquiry here as to the poor quality of my buds and the common themes amongst the limited responses were: 1) lighting, and 2) genetics. So, I decided to build some arrays using the Bridgelux EB-series strips and I’ve relegated the 300w units to cloning and seed production in other rooms. I went with 8 x BXEB-L1120Z-40E4000-C-A3 strips (1120 mm, 4000’k) each mounted on a 48” length of angle aluminum and driven by 2 Mean Well HLG-185H-C1050A drivers.

I can post a detailed parts list with cost, source, and photos if anyone’s interested. Just ask.

These suckers are sweet! Bright as hell and very efficient. Running the drivers at 100% the temps directly on the strips are 23’C, the top surface of the angle aluminum is 25’C. The drivers run pretty hot: ~45’C, but well within operating temps. I an also lower the light to within a cm of the tops – the plants won’t get burned unless a leaf or top actually touches one of the LED bulbs for an extended period. And the coverage is amazing.

So back in late April I put 3 1-month old clones from my first Northern Lights grow under these new lights and let ‘em veg for another month on the 18/6 schedule before flipping them to 12/12 on May 23.

Here they are at the flip:

IMG_20170524_163923506.jpg

And today, at the beginning of week 5:

IMG_20170620_093521030.jpg

IMG_20170620_093534037.jpg

I have to say, at the outset I was skeptical re: these lights, but as the girls progress into full bloom, I’m becoming more optimistic. The plants have finished their stretch and the copious buds are filling in and thickening nicely.

This is my second grow, so please chime in if you spot anything amiss or if you have any experiential advice. I’ll continue to post updates through harvest.
Your leaf tips are not toasted by running your nutes to hot...very common. Your leaves are not burnt from hitting them with to many photons. Very nice looking buds...just starting to Amber up. Would like to see how much they fatten up over the next few weeks. Good job!
 

whytewidow

Well-Known Member
Very very nice. I would def be interested in a list of parts and prices for your light build. When you get time. I'm pulling the trigger on a diy led setup. And I like how close you can get your lights to the canopy. Any other pics of the light? I'm definitely subbed. Keep up the good work.
 

Danielson999

Well-Known Member
Looks great and nice to see your progress. You must have them dimmed down hey? 400w in a 2'x4' space would be pretty intense at 4 to 6 inches away.
 

Chip Green

Well-Known Member
That's the kind of reassurance I really enjoy seeing.....Are there more "optimal" options available for slightly more output? Certainly, but these EB strips are SO EASY to work with for first time DIYers like me that I don't feel the need to complicate the process by using anything other....
Awesome.....
 

graying.geek

Well-Known Member
Your leaf tips are not toasted by running your nutes to hot...very common. Your leaves are not burnt from hitting them with to many photons. Very nice looking buds...just starting to Amber up. Would like to see how much they fatten up over the next few weeks. Good job!
Thanx for the health check. Not always certain what I'm looking at so some experienced eyes are appreciated.
 

graying.geek

Well-Known Member
Very very nice. I would def be interested in a list of parts and prices for your light build. When you get time. I'm pulling the trigger on a diy led setup. And I like how close you can get your lights to the canopy. Any other pics of the light? I'm definitely subbed. Keep up the good work.
I'll get the parts list up as soon as I get it put together. Check back in a couple of days.
 

graying.geek

Well-Known Member
Looks great and nice to see your progress.
Thanx for the praise. I'm hoping the trend continues.

: said:
You must have them dimmed down hey? 400w in a 2'x4' space would be pretty intense at 4 to 6 inches away.
Actually, not. I ran the drivers at 80% during veg, but they've been turned up to 100% during 12/12. These things give off very little heat at the strips. I can lower them to 1 cm from the canopy and no burns. Only if a leaf or bud actually remains in contact with an LED bulb will it burn. They're incredibly efficient.

As far as >"400w in a 2'x4' space", I get the same number when I do the math, and was shooting for close to 50w/sqft in the PAR spectrum, but when I plug both drivers into my kilowatt meter, I'm only showing that the drivers combined are only pulling about 175 watts. My college physics are about 40 years stale, so maybe someone with electrical expertise can demystify this seeming anomaly for me?
 
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graying.geek

Well-Known Member
That's the kind of reassurance I really enjoy seeing.....Are there more "optimal" options available for slightly more output? Certainly, but these EB strips are SO EASY to work with for first time DIYers like me that I don't feel the need to complicate the process by using anything other....
Awesome.....
Completely agree. These things are efficient, inexpensive and easy to diy. I'm very pleased thus far.
 

VegasWinner

Well-Known Member
Thanx for the praise. I'm hoping the trend continues.



Actually, not. I ran the drivers at 80% during veg, but they've been turned up to 100% during 12/12. These things give off very little heat at the strips. I can lower them to 1 cm from the canopy and no burns. Only if a leaf or bud actually remains in contact with an LED bulb will it burn. They're incredibly efficient.

As far as >"400w in a 2'x4' space", I get the same number when I do the math, and was shooting for close to 50w/sqft in the PAR spectrum, but when I plug both drivers into my kilowatt meter, I'm only showing that the drivers combined are only pulling about 175 watts. My college physics are about 40 years stale, so maybe someone with electrical expertise can demystify this seeming anomaly for me?
The drivers can max at 200w each with full Vf forward voltage. If you add up voltage you will find you could probably run the entire string on one driver instead of two and be efficient too
 

Danielson999

Well-Known Member
Thanx for the praise. I'm hoping the trend continues.



Actually, not. I ran the drivers at 80% during veg, but they've been turned up to 100% during 12/12. These things give off very little heat at the strips. I can lower them to 1 cm from the canopy and no burns. Only if a leaf or bud actually remains in contact with an LED bulb will it burn. They're incredibly efficient.

As far as >"400w in a 2'x4' space", I get the same number when I do the math, and was shooting for close to 50w/sqft in the PAR spectrum, but when I plug both drivers into my kilowatt meter, I'm only showing that the drivers combined are only pulling about 175 watts. My college physics are about 40 years stale, so maybe someone with electrical expertise can demystify this seeming anomaly for me?
As someone else stated, you're probably only using half the forward voltage of your drivers. This is why I guessed that it was dimmed. Not only does it look dimmer than 400w in a 2'x4' should, it would likely fry your plants (not from heat) an inch or two away. Something must be up....
 

bakedPotatoe

Active Member
As someone else stated, you're probably only using half the forward voltage of your drivers. This is why I guessed that it was dimmed. Not only does it look dimmer than 400w in a 2'x4' should, it would likely fry your plants (not from heat) an inch or two away. Something must be up....
Not really you can get them to touch the plants..
Its all because its spread over a large surface area,unlike a single source from a HPS...
And they run cooler as well..
Because you dont need the same watts,you can use say 450 as a replacement for a 600 because of efficiencys..
 

canadian1969

Well-Known Member
Not really you can get them to touch the plants..
Its all because its spread over a large surface area,unlike a single source from a HPS...
And they run cooler as well..
Because you dont need the same watts,you can use say 450 as a replacement for a 600 because of efficiencys..
proximity to the canopy aside, I think they are saying its wired incorrectly for max output
 
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