https://www.digikey.co.uk/product-d...C-C3/976-BXEB-L0340U-30E0750-C-C3-ND/10279849
Those are the ones I purchased^
BXEB-L0340U-30E0750-C-C3
At 700ma, they're rated 10.9v? Or have I got that wrong?
Bridgelux eb strips Gen 3
- Thread starter Rocket Soul
- Start date
https://www.digikey.co.uk/product-d...C-C3/976-BXEB-L0340U-30E0750-C-C3-ND/10279849
Those are the ones I purchased^
BXEB-L0340U-30E0750-C-C3
At 700ma, they're rated 10.9v? Or have I got that wrong?
Rocket Soul
Well-Known Member
Sorry, you had some bad advice. The fV oof those strips arent 11ish, its 20ish. I think i know what happened: whoever adviced you assumed that 1 foot strip follows same pattern as 2' and 4' : half the voltage, but 1 foot strips have same voltage as 2 foot strips but half max current.
Check out growmau5 diy vids and start familiarise yourself with reading datasheets its the only way to make sure you dont buy the wrong stuff or burn down your house due to someones bad advice.
Edit: sorry, this was based on the 280 mm stripps, not sure on the slim line.
On the slim line 1ft BXEB-L0340U-xxx0750-C-C3
Forward voltage is shown as 10.9v on the datasheet
The 2ft indeed have ~20fv, but I can see on the data sheet it says 10.9v for the 1foot strips? I'm so confused because I'm clearly reading the data sheet for the strips wrong but I don't understand how/where
Forward voltage is shown as 10.9v on the datasheet
The 2ft indeed have ~20fv, but I can see on the data sheet it says 10.9v for the 1foot strips? I'm so confused because I'm clearly reading the data sheet for the strips wrong but I don't understand how/where
Moflow
Well-Known Member
Gotcha now, yes 10.9V..
There's that many codes it's confusing.
I can see it on the datasheet for slim.
You should be able to fit 8 or 9 of those on the driver.
Maybe recheck the wiring
Rocket Soul
Well-Known Member
Youre right, it should be working. Can you measure the dc output of the driver? V and A?
I will borrow a multimeter from work and try this, I will also recheck my wiring, take everything apart and re do it, newbie at this all so it's probably me making a mistake somewhere
Rocket Soul
Well-Known Member
Flashing/strobing of leds isu usually due to insufficient voltage. Figure out if the driver is outputting what it should. It could. Also be some problem of your driver shutting down for a sec then turning back on.
Disconnecting everything and reconnecting might help. Try what happens with 4 strips in series aswell. If a lower amount of strips lights up with no problem its pretty certain to be too little voltage provided or the strips having higher voltage.
Have you been able to confirm you have the right product (strips are 340 mm and not 280?)
Disconnecting everything and reconnecting might help. Try what happens with 4 strips in series aswell. If a lower amount of strips lights up with no problem its pretty certain to be too little voltage provided or the strips having higher voltage.
Have you been able to confirm you have the right product (strips are 340 mm and not 280?)
Rocket Soul
Well-Known Member
Glad you got it worked out. Yes, you can add another strip iin series as long as you still have enough voltage overhead on the driver. Make sure the 700 mA is not highrr than the max current of the strip and you should be fine.
Isawthelight
Well-Known Member
You had me worried that I'd given out bad driver advice. Glad all strips are lit.
cobshopgrow
Well-Known Member
nice to hear you got your setup working, have fun.
Will add some 660nm also, just in to making some strips for myself, similar form factor then the slim eb3.
Will add some 660nm also, just in to making some strips for myself, similar form factor then the slim eb3.
Rocket Soul
Well-Known Member
Has anyone counted how many diodes the gen 3 have? Per "foot" of strip?
cobshopgrow
Well-Known Member
on the eb 3 slim it should be 5cm 10 leds each, one led = 5mm.
My 340mm have 68 leds each (if i am right) am using 3808 leds on 320W.
For the regular 1 foot they printed 7S8P so 56 leds i would say.
My 340mm have 68 leds each (if i am right) am using 3808 leds on 320W.
For the regular 1 foot they printed 7S8P so 56 leds i would say.
Please Can you check my PPFD?
In forum I found this information EB strim G3 use same led like G2
I use data from this: - EB Series Gen2 3000K@700mA(87,5mA per diode)
QER=4.84 µmol/J
LER=331.66 lm/W
EB gen 3 have 186lm
Eff 56%
120W = 67,2 PAR W
Space 30*120cm = 0,36m2
67,2*4,84 = 325,248 umol/s
325,248/0,36 = 903 PPFD
With 10%Wall lost PPFD is 813,12.
Is it ok?
In forum I found this information EB strim G3 use same led like G2
I use data from this: - EB Series Gen2 3000K@700mA(87,5mA per diode)
QER=4.84 µmol/J
LER=331.66 lm/W
EB gen 3 have 186lm
Eff 56%
120W = 67,2 PAR W
Space 30*120cm = 0,36m2
67,2*4,84 = 325,248 umol/s
325,248/0,36 = 903 PPFD
With 10%Wall lost PPFD is 813,12.
Is it ok?
cobshopgrow
Well-Known Member
sounds good, maybe no setup for CO2 but power conservative.
i dont think you will have less lumens compared to your cxb3590, youll have it all worked out, go for it.
i dont think you will have less lumens compared to your cxb3590, youll have it all worked out, go for it.
cobshopgrow
Well-Known Member
both will do it there no single daisy chain, should be safe.
differences between the resistance of your 2 configs shouldnt matter, so why not option 2.
the + - traces on the sides are pretty wide, otherwise option 1 is in slight advantage there, i think.
differences between the resistance of your 2 configs shouldnt matter, so why not option 2.
the + - traces on the sides are pretty wide, otherwise option 1 is in slight advantage there, i think.
Rocket Soul
Well-Known Member
Finally i got full reports from TEKNIK of the eb gen 3, 2700k 90 cri. The strip used was the 590 mm slim version.
Some notes: tests are made at working temperature, not pulsed. The range is 380-840nm
Please note that both ppf and radiated watts are in the report, this last thing is note worthy as we are getting more and more into lights incorporating UV and low nm: these nm will always be at disadvantage as 50% efficiency 380 is much less, like almost half iiuc, of a 730nm diode at 50% efficiency. Please correct me if those numbers are wrong. The idea is to use both ppf/w and % efficiency when we judge a light so that sacrificing ppf/w in order to get at those pesky sub 400 nm we all seem to crave doesnt mean that it tanks the lights stats. Kinda like cmh looks much better when we look at % efficiency than if you look at ppf. However no real uv in these strips though.
Efficiencies are around 53% or 2.67 at near to nominal and all numbers are board numbers, not system. Not too shabby hard to say about true to datasheet cause the 90 cri section is a joke, every cct with 161 lum/w iirc.
I also gleamed a peak on what TEKNIK is looking at next, some very interesting stuff but i had to promise not to divulge too much but safe to say that Buddies isnt his last product by far, but covid and just general freezed up cashflows is putting a hold on most stuff. I gather it will be premium rather than bang for buck.
Some notes: tests are made at working temperature, not pulsed. The range is 380-840nm
Please note that both ppf and radiated watts are in the report, this last thing is note worthy as we are getting more and more into lights incorporating UV and low nm: these nm will always be at disadvantage as 50% efficiency 380 is much less, like almost half iiuc, of a 730nm diode at 50% efficiency. Please correct me if those numbers are wrong. The idea is to use both ppf/w and % efficiency when we judge a light so that sacrificing ppf/w in order to get at those pesky sub 400 nm we all seem to crave doesnt mean that it tanks the lights stats. Kinda like cmh looks much better when we look at % efficiency than if you look at ppf. However no real uv in these strips though.
Efficiencies are around 53% or 2.67 at near to nominal and all numbers are board numbers, not system. Not too shabby hard to say about true to datasheet cause the 90 cri section is a joke, every cct with 161 lum/w iirc.
I also gleamed a peak on what TEKNIK is looking at next, some very interesting stuff but i had to promise not to divulge too much but safe to say that Buddies isnt his last product by far, but covid and just general freezed up cashflows is putting a hold on most stuff. I gather it will be premium rather than bang for buck.
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