Bridgelux EB Series Build

Serva

Serva

Well-Known Member
Buck5050 said:
Looking at the graph on the data sheet. It looks like the gen2s will run closer to 20v at the 1050ma mark. With that said it's more like 21w per strip. So to reach that 35 w/sqft number I need 14 strips at this current. Problem I am having is I grabbed an HLG-185H-C1050B from Arrow its looking more and more like this is not enough to light my space. If I was to add 6 5000k to my build what single driver solution would cover 14 of these at 1050ma? HLG -240H-C1050B maybe?
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Sorry, you are totally right, with the 20v. I was tired and mixed my answers I gave to both of you :bigjoint:

But, I corrected my calculation, i just didn‘t corrected the 22v, that I had written down before...

Because 22v * 1.05a = 23.1w ;)
 
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Randomblame

Randomblame

Well-Known Member
Serva said:
Sorry, you are totally right, with the 20v. I was tired and mixed my answers I gave to both of you :bigjoint:

But, I corrected my calculation, i just didn‘t corrected the 22v, that I habe written down before...

Because 22v * 1.05a = 23.1w ;)
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If you apply 22v to an EB gen2 strip it would probably take 2 or more amps...
At 1050mA it would be 20v!

Screenshot_20171231-100714.png
 
ANC

ANC

Well-Known Member
So at what temperature can it still deal with that output? I hate how they always hide the bad news in the temperature derating graphs.
 
ANC

ANC

Well-Known Member
nfhiggs said:
Another solution is to use a 10W 3-5 ohm series dropping resistor. It will drop 1 volt per ohm at 1 amp. It will burn up a few watts of power and reduce overall efficiency, but it will work.

Edit: One resistor in series with each strip. If you're running less than one amp, use 5 ohm, if over one amp use 3 ohm.
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This is a crude and inefficient solution that can be improved on by using a larger pool to select components with similar parameter from.

Even if I just build a 4 power transistor amplifier, I buy like 50 of the transistors and use a rig to sort them according to performance, then I have exact pairs.
 
Serva

Serva

Well-Known Member
Randomblame said:
No offense, mate, if not today when then ..?
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I know you wouldn‘t feel offended, even when I directly irritate or insult you, you wound‘t! Because you are one of the most nicest guy around here! But it makes me feel sorry, if I talk like a fool! :wall: Talking without thinking, whatever the reason is... definitely not my habit! If I don‘t know something, I shut up, or say that I DON’T know it. :peace:

Happy New Year! :bigjoint:
 
S

snooplover5

Active Member
Quick question guys, the 30w/sqft criteria was also applicable to the Gen1 series no ? As the Gen2 are a little more efficient, why isn't that we can't aim for a little lower ?

Cheers!
 
Serva

Serva

Well-Known Member
You can, but it‘s not that much ;) 12% better efficiency (it‘s not the correct number, just what I remeber!). So instead of 30w you need what 27w now? Actually I never measured anything, and it is just what I saw where my plants were happy: 30-35w. People here also reported to run 60-100w/sqft without bleaching, but I CAN NOT belive this and will never advice something like that!
 
Randomblame

Randomblame

Well-Known Member
Yepp, LED's getting better with every generation.
3-4 years ago you needed about 40-50w/sft., then it was about 35-40w and now you can away with 30w/sft and achieve good results. In fact, using less watts per sft. work more efficiently and its more easily to come over 1g/w.
A good value would be 700-800μmol/s and you can achieve that with 30w/sft. strip light.

ppfd-charts.png
 
Randomblame

Randomblame

Well-Known Member
Currently I have 380w max.over an area of 10sft, so 38w/sft., but the lamps go on sale and new ones are coming up.
My new ones will be only around 320w, but since they're more efficient than the old CD bin Cree COB's "and I have to keep less distance with strips", they will provide more usable light from less watts at the end.
So my next build provides only ~32w/sft., but at 8-10" distance from canopy it will hit the 1000μMol/s mark for sure.
Unfortunately the driver is currently not available and I have to wait another week untill he arrive.
 
Serva

Serva

Well-Known Member
I am so happy that I bought 5x hvgc-100-350a from pollin! 15€ / piece, and it‘s working with gen1 + gen2... Even alot of monos will work with them. Yeah, more dangerous than 20-24v, but I don‘t need to get any new driver soon.
 
Randomblame

Randomblame

Well-Known Member
Serva said:
I know you wouldn‘t feel offended, even when I directly irritate or insult you, you wound‘t! Because you are one of the most nicest guy around here! But it makes me feel sorry, if I talk like a fool! :wall: Talking without thinking, whatever the reason is... definitely not my habit! If I don‘t know something, I shut up, or say that I DON’T know it. :peace:

Happy New Year! :bigjoint:
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Too much honor ..! I'm just an insignificant member trying to help others here and there. But thanks for the kind words and happy new year!

 
Randomblame

Randomblame

Well-Known Member
Serva said:
I am so happy that I bought 5x hvgc-100-350a from pollin! 15€ / piece, and it‘s working with gen1 + gen2... Even alot of monos will work with them. Yeah, more dangerous than 20-24v, but I don‘t need to get any new driver soon.
Click to expand...

Mmmmhhh! I have only a HLG-60 laying around..! But it will be used for some voltage testings before the strips will be glued.
 
Randomblame

Randomblame

Well-Known Member
Serva said:
It‘s already enough to shine out of the crowd! And aou know it yourself, I am not the only one thinking like that! You get alot of positive feedback! :clap: Guess you shouldn‘t change anything within the next year! ;)
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Thanks again!
I will not change anything beside my LED's every now and then and as long as my old bones allow I'll further grow.
 
S

snooplover5

Active Member
Ok gotcha guys, thanks! I was assuming the PPFD had a role to play too. If ever the efficiency improves but the spectrum sucks, it wouldn't always be as interesting for us!
 
Kenny Grows

Kenny Grows

Active Member
Randomblame said:
S***!
You need a either a 20v CV driver or a CC driver for gen2!
The only way to use this driver is to force them into constant current mode./QUOTE]
I think @Serva was right I should've went to sleep earlier last night. I misread the drivers datasheet it's a CV and CC driver.
I misread the datasheet, luckily its CC region is between 17-24. So I think I could use this driver in CC mode with Gen1 and Gen2.
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1

1212ham

Well-Known Member
nfhiggs said:
Another solution is to use a 10W 3-5 ohm series dropping resistor. It will drop 1 volt per ohm at 1 amp. It will burn up a few watts of power and reduce overall efficiency, but it will work.

Edit: One resistor in series with each strip. If you're running less than one amp, use 5 ohm, if over one amp use 3 ohm.
Click to expand...
Rather than use a resistor, possibly a single LED, to maintain efficiency?
 
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