EB Series™ Gen 2 Build
- Thread starter Canadain Closet Gardener
- Start date
Series circuits: Add up the forward Voltage for each strip in your build to get your total forward voltage (e.g. 10 strips at 23 volts = 230 total volts). Find a driver that has an upper voltage limit that is greater than your total forward voltage and a lower voltage limit that is lower than your total voltage at the current you want to run at (a Meanwell HLG-240H-C1050 would work for this example...pull up the datasheet to confirm). Series circuits, you add the voltages and the current remains the same through each strip. EQ: Vtotal = #strips * V forward of each strip. Current total = Current strip
Parallel circuit: Multiply the current you will be running each each strip by the number of strips to obtain the total current needed. Confirm the voltage drop of a single strip against the current you will be running in the datasheet sheet (there should be a voltage v. current graph) and look at the typical and max voltage in one of the tables in the datasheet. Find a driver that supplies more than the forward Voltage required (I would use the max voltage) and at least the total current required (e.g. for 10 strips @ 1 A, if Vf of one strip=23v, then a driver that produces 20-26v and supplies at least 10 A would be a match). Parallel circuits are like a manifold, you add the currents of the strips and the voltage across each strip remains generally the same. EQ: Vtotal = Vstrip. Current total = # strips * Current strip
Parallel circuit: Multiply the current you will be running each each strip by the number of strips to obtain the total current needed. Confirm the voltage drop of a single strip against the current you will be running in the datasheet sheet (there should be a voltage v. current graph) and look at the typical and max voltage in one of the tables in the datasheet. Find a driver that supplies more than the forward Voltage required (I would use the max voltage) and at least the total current required (e.g. for 10 strips @ 1 A, if Vf of one strip=23v, then a driver that produces 20-26v and supplies at least 10 A would be a match). Parallel circuits are like a manifold, you add the currents of the strips and the voltage across each strip remains generally the same. EQ: Vtotal = Vstrip. Current total = # strips * Current strip
Randomblame
Well-Known Member
How long are these tubes and how much strips per tube. This looks more like 2ft(~60cm) instead like 1ft.(~30cm) tubes.
How much total power watt do you want to have?
To choose a matching driver one need to know which strips you use(part-#, link), how many and how hard you want to drive them.
If one strip is 19,5v and 350mA and you connect 9 in series you need a driver with a Vf of more than 175,5v and 350mA. A HLG-60H-C350B would match and delivers 61,5w net. and 67,5w total(wall watts). If you like to drive them hard, say we at 700mA, you need a driver with min. 178,5v but with 700mA. In this case a HLG-120H-C700 would match and delivers up-to 125w net. and 135w at the wall.
Canadain Closet Gardener
Well-Known Member
Each tube is 35 inches so 3 strips per tube.
I want to be blinded lol
Im eather going with 24/27/ 30 strips
Been watching alot of mean well driver vids today.
Cheers
CCG
Randomblame
Well-Known Member
Okay, now let's have a look at parallel wiring.
You could also take a HLG-240 or 320 or 480H-20A, these all are 20v drivers with different current, and connect all the strips in parallel.
A HLG-320H-20A delivers up to 15A, with 30strips in parallel each strip would get 500mA(15A:30strips=0,5A). Vf @500mA is ~20v, so each strip would run at 10w for ~300-320w.
With a HLG-240H-20A(12,5A) and 24 strips it would be about the same 10w per strip, a tiny bit more(12,5A:24strips=520mAx 20V=10,4w), so ~250w total.
A HLG-480H-20A delivers 24Amps, with 27 strips in parallel each would get 888mA(24:30=88
which is already too much. You need at least 34 strips in parallel to run each strip at ~700mA(24A:34strips=705mA per strip, 700mA is maximum for the 1footers).
At 500mA the gen.2 strips run at ~170lm/w(best price performance area, IMO ) with a HLG-320 you would get ~51.000lm. This is enough for a 3x 3' and fits perfect in a 2x 4' tent.
I do not know if it blinds you, but you certainly need sunglasses ...
You could also take a HLG-240 or 320 or 480H-20A, these all are 20v drivers with different current, and connect all the strips in parallel.
A HLG-320H-20A delivers up to 15A, with 30strips in parallel each strip would get 500mA(15A:30strips=0,5A). Vf @500mA is ~20v, so each strip would run at 10w for ~300-320w.
With a HLG-240H-20A(12,5A) and 24 strips it would be about the same 10w per strip, a tiny bit more(12,5A:24strips=520mAx 20V=10,4w), so ~250w total.
A HLG-480H-20A delivers 24Amps, with 27 strips in parallel each would get 888mA(24:30=88
which is already too much. You need at least 34 strips in parallel to run each strip at ~700mA(24A:34strips=705mA per strip, 700mA is maximum for the 1footers).At 500mA the gen.2 strips run at ~170lm/w(best price performance area, IMO ) with a HLG-320 you would get ~51.000lm. This is enough for a 3x 3' and fits perfect in a 2x 4' tent.
I do not know if it blinds you, but you certainly need sunglasses ...
thetr33man
Well-Known Member
Are the eb strips aluminum or some type of circuit board on the bottom side? How much power will the gen2 be able to handle?
Great information !! Ledgardener also has a great find a driver tool. Compare your calculations above as secondary check.
Certainly Par numbers would be good...Okay, now let's have a look at parallel wiring.
You could also take a HLG-240 or 320 or 480H-20A, these all are 20v drivers with different current, and connect all the strips in parallel.
A HLG-320H-20A delivers up to 15A, with 30strips in parallel each strip would get 500mA(15A:30strips=0,5A). Vf @500mA is ~20v, so each strip would run at 10w for ~300-320w.
With a HLG-240H-20A(12,5A) and 24 strips it would be about the same 10w per strip, a tiny bit more(12,5A:24strips=520mAx 20V=10,4w), so ~250w total.
A HLG-480H-20A delivers 24Amps, with 27 strips in parallel each would get 888mA(24:30=88
At 500mA the gen.2 strips run at ~170lm/w(best price performance area, IMO ) with a HLG-320 you would get ~51.000lm. This is enough for a 3x 3' and fits perfect in a 2x 4' tent.
I do not know if it blinds you, but you certainly need sunglasses ...
Canadain Closet Gardener
Well-Known Member
So Digikey removed the est date for the release of the Bridgelux Gen 2 strips. I figure if I wait (with my luck) they wont show until February so I'm going with 30 Samsung strips, the price difference is only an extra $75 with the volume discount. They are rated more efficient too.
Cheers
CCG
Cheers
CCG
snooplover5
Active Member
Hey, I've got an order of them EB Gen 2s and digikey is still listing the est. shipping for the 24th of December.
Cheerz
Cheerz
Below is the post you replied to, I had deleted it as I thought I had some incorrect numbers. I was looking at the F-Series, I now see you are referring to H-Series.
H-series are expensive, $7.95000 for 5.8 watts!
EB gen 2, $4.13000 for 6.8 watts. I wait for these as I have a 42 volt driver that can run them in series/parallel.
I'm planning the same build for the same tent. Digikey shows 12/23 ship date.
What part numbers are you comparing? I see 175 lm/W for EB gen 2 and 171 lm/W for the F-Series, both at 3500K.
https://www.digikey.com/product-detail/en/bridgelux/BXEB-L0280Z-35E1000-C-B3/976-1736-ND/7907665
https://www.digikey.com/product-det...-inc/SI-B8U261280WW/SI-B8U261280WW-ND/7649215
H-series are expensive, $7.95000 for 5.8 watts!
EB gen 2, $4.13000 for 6.8 watts. I wait for these as I have a 42 volt driver that can run them in series/parallel.
I'm planning the same build for the same tent. Digikey shows 12/23 ship date.
What part numbers are you comparing? I see 175 lm/W for EB gen 2 and 171 lm/W for the F-Series, both at 3500K.
https://www.digikey.com/product-detail/en/bridgelux/BXEB-L0280Z-35E1000-C-B3/976-1736-ND/7907665
https://www.digikey.com/product-det...-inc/SI-B8U261280WW/SI-B8U261280WW-ND/7649215
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Canadain Closet Gardener
Well-Known Member
It's more of an impatience thing for me. They seem to have added the ship date back but I'm still going to go with the Samsung's as I want my tent ready for the new year.
How tall is your tent. Mine is 62 and 2/3 inches tall. It's 1/2 an inch too tall for what I wanted to use it for.
This is the strip I'm pretty sure I'm going to go with.
https://www.digikey.ca/product-detail/en/SI-B8U05128HUS/1510-1585-ND/6149750
Cheers
CCG
My tent is an iPower 36"x20"x62". I just measured and it's actually 63" tall. BTW, you could probably cut the poles of your tent 1/2" and make it fit.
Also, I use this thermal tape for fast, easy, effective mounting.
https://www.ebay.com/itm/BCP-1roll-15mm-x-50m-Double-Side-Adhesive-Thermal-Conductive-Tape-for-/162616247963?_trksid=p2349526.m4383.l4275.c10
Also, I use this thermal tape for fast, easy, effective mounting.
https://www.ebay.com/itm/BCP-1roll-15mm-x-50m-Double-Side-Adhesive-Thermal-Conductive-Tape-for-/162616247963?_trksid=p2349526.m4383.l4275.c10
Canadain Closet Gardener
Well-Known Member
I might just do that, but i like the excuse of getting another tent
I have two rolls on order from different suppliers. I just checked and it looks like one will be delivered tomorrow or Friday
I think this tent size will be great for holding my mother plants off site once the law changes here. I have my medical permit. So once it's legal for everyone here to have 4 plants. I'll be able to cultivate multiple strains. I have a few friends and family who wont mind keeping a veg tent as there is really not much of a smell.
How many strips are you going to use in your build?
Cheers
CCG
Randomblame
Well-Known Member
You can calculate PPF from data below and apply it to your area to get PPFD.
EB Series Gen2 3000K@700mA(87,5mA)
QER=4.84 µmol/J
LER=331.66 lm/W
= 2.55 µmol/J
If you drive the EB Series gen.2 strips with 700mA with a HLG-240H(250w) you get around 635μMol/s PPF. With more strips and lower current the effiency increase but costs also. You can find even more data back in the thread(EB gen1, H and F series)
These are F-Seires numbers at nom. current. Imagine running then at 80mA per diode(same as H-Series) and effiency increase to 180lm/w or ~2,8μMol/J. That's ~700μMol/s PPF from only 250w(same driver, each strip at 720mA).
F-Series Gen3 3000K@1120mA
QER=4.86 µmol/J
LER=321.60 lm/W
= 2.54 µmol/J
I've just read the datasheet and I'm kind of confused in reading correctly this diagram:
so, does this tell us that if, 1400ma, 20.5V are given, get a 200% Luminous Flux, so a 100% more, so double the flux at 700ma, 19.5V ? That would be a huge gain in lumens, double? am I right? cheers.
Would there be any cons?
Some math, don't know if I'm correct, few days in this led world and volt and amps etc etc.. so pardon me
1.4A x 20,5V = 28,7W double the lumens would be 2390 x 2 = 4780lm
4780lm / 28,7W = 166,5 lm/W so efficency drops but cost is great, for 7-8$ is a great price.
Can this be a good estimacy?
so, does this tell us that if, 1400ma, 20.5V are given, get a 200% Luminous Flux, so a 100% more, so double the flux at 700ma, 19.5V ? That would be a huge gain in lumens, double? am I right? cheers.
Would there be any cons?
Some math, don't know if I'm correct, few days in this led world and volt and amps etc etc.. so pardon me
1.4A x 20,5V = 28,7W double the lumens would be 2390 x 2 = 4780lm
4780lm / 28,7W = 166,5 lm/W so efficency drops but cost is great, for 7-8$ is a great price.
Can this be a good estimacy?
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Initially I thought of 18 or 20 gen 2 strips. Obviously I made a math error as 26 are needed for 35 watts/ft at the nominal power of 6.8 watts. I'm rethinking and may hang some vertically in the corners and possibly the side walls also.
Questions for the experienced guys running strips...
I would expect less power needed with the excellent light spread and efficiency of strips, what is good watts/ft?
For a 63" (160cm) tall tent what would be a good length for vertical strips? I'm thinking 560mm/22"?
Questions for the experienced guys running strips...
I would expect less power needed with the excellent light spread and efficiency of strips, what is good watts/ft?
For a 63" (160cm) tall tent what would be a good length for vertical strips? I'm thinking 560mm/22"?
Randomblame
Well-Known Member
30-40w/sft is enough and the 2ft strips are as good as the 1ft or 4ft strips. How big is your tent? 2x 4'?
1050mA(170lm/w) seems the sweet spot and you get ~20w per strip. A HLG-240(12 strips) or 320H-C1050(15 strips) would be a good choice.
1050mA(170lm/w) seems the sweet spot and you get ~20w per strip. A HLG-240(12 strips) or 320H-C1050(15 strips) would be a good choice.