BXEB gen 2 4x4 build

diggs99

diggs99

Well-Known Member
1212ham said:
I don't know the advantage to 560mm strips end to end, other than spreading them a little for slightly better light distribution. A 44" is normally cheaper than two 22". Sometimes, it's just a matter of what's available or on sale. 22" strips would be double the wiring in parallel, unless you daisy chain them, but then there's a voltage drop going through the first strip. If you connect pairs of two in series, it's just a matter of adding a short piece of wire between the two.

Also, with strips, aluminum angle is considered a heat sink. When I refer to no heat sink, I mean strips suspended on a frame.

The so called sweet spot is a matter of opinion, how many more strips do you want to buy for a small efficiency gain? Most run them at 700-1050ma.
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Thanks for this post, by the time I was done reading I was sold on def using the 4' strips.

Now to decide between bxeb or spending the extra cash and ordering more fseries.

The cutters looked good but not if I gotta wait months to get them.

Last I checked fseries were almost sold out on digikey and bxeb was showing 700+ in stock.
 
diggs99

diggs99

Well-Known Member
1212ham said:
I'd use around 18-24 strips. Some spacing will allow airflow and prevent bank account depletion! ;)
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Thanks for the help bud.

Going to order 18 bxeb 4' and run them on a 600h driver. 33.3w per strip should be decent enough.
 
whytewidow

whytewidow

Well-Known Member
1212ham said:
If you run the 560mm strips, I'd run one wire between the ends to connect in series, and use a 42v driver. Or use the 1120mm long strips. 700ma is rated current, 1.4A max. People have reported that temperatures are ok running at 1050ma naked, no heat sink.

480 or 600 watt driver, it's just a matter of personal preference and cost. Some of our most respected members say 30w/ft, others say 50, but that's a lot of light and several people have had problems disappear after turning down the power.
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Thatll work as well theres so many different options when it comes to drivers. And 50w sqft is high. My light will crank up to 71w per sqft but I nvr run any where close to that. I run em soft. But I also built it for future. For the next area I open up is gonna be bigger. And that way i dont have to build another. I can jus raise it and crank it up.
 
whytewidow

whytewidow

Well-Known Member
1212ham said:
I don't know the advantage to 560mm strips end to end, other than spreading them a little for slightly better light distribution. A 44" is normally cheaper than two 22". Sometimes, it's just a matter of what's available or on sale. 22" strips would be double the wiring in parallel, unless you daisy chain them, but then there's a voltage drop going through the first strip. If you connect pairs of two in series, it's just a matter of adding a short piece of wire between the two.

Also, with strips, aluminum angle is considered a heat sink. When I refer to no heat sink, I mean strips suspended on a frame.

The so called sweet spot is a matter of opinion, how many more strips do you want to buy for a small efficiency gain? Most run them at 700-1050ma.
Click to expand...
I wouldnt run them in parallel. I'd series them. And you can run up to 23 before voltage drop starts. I had a 2vdc drop on the 24th strip.
 
whytewidow

whytewidow

Well-Known Member
Chip Green said:
I thumb my nose at thermal management, within reason... up to say 1100ma(ish) with all my 560mm BXEB Gen1 3500K.
Widow had it tho, when you get past that point, it becomes a point of dimininshing return situation.

They're workhorses. They have a more rigid structure than the Samsung Fs.I have never regretted buying one, ever....not one time......I just got an email from Arrow, more on the way. I cant stop.
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Damnit you beat me to ordering them. Lol
 
diggs99

diggs99

Well-Known Member
Thanks AW

Those cutters you linked earlier at 91cri certainly look nice and the price is set reasonably. I like them.

Wish they came in 1120mm, the lazy side of me loves less parts lol

i was gonna mash the order button on digikey as soon as i woke up this morning, gonna have to do a little more reading/question asking first. If the cutters are superior to the bxeb , ill go that route.

Thanks bros
 
Airwalker16

Airwalker16

Well-Known Member
diggs99 said:
bxeb 4' strips it is.

Still deciding on 16-18-20 # of strips.

Gonna run 2 x 320 drivers
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Buy as many as you'll need to hit that 1050MA so you don't need heatsinks. Also, don't use series wiring. That's super high voltage you're Fucking with and parallel is just loads safer. But I guess using 2 320's halves the voltage but youll still be well over 150+V.
 
diggs99

diggs99

Well-Known Member
Airwalker16 said:
Buy as many as you'll need to hit that 1050MA so you don't need heatsinks. Also, don't use series wiring. That's super high voltage you're Fucking with and parallel is just loads safer. But I guess using 2 320's halves the voltage but youll still be well over 150+V.
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I just based the plan off led gardeners 4x4 build and the guidance of Whytewidow, i added more strips for efficiency. They were running 12 strips on a 480 and said it was running strips at 75%

I figure ill run 10 per 320 driver, putting me very close to that mark?

Im sure theres an easy math equation on how to exactly figure that out, still learning here lol
 
diggs99

diggs99

Well-Known Member
small change of plans again lol

final decisions have been made, huge thanks to @whytewidow for all the help.

22 x 4` Bridgelux eb series gen 2 strips
16 x 4` on 480 driver
6 x 4` on 185 driver

Thanks to everyone who offered advice , its always appreciated.
 
whytewidow

whytewidow

Well-Known Member
Airwalker16 said:
Buy as many as you'll need to hit that 1050MA so you don't need heatsinks. Also, don't use series wiring. That's super high voltage you're Fucking with and parallel is just loads safer. But I guess using 2 320's halves the voltage but youll still be well over 150+V.
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Parallel is no safer than series. There is more failures in parallel wiring than any other type. Its using the right parts that are rated are for what your doing. And thermal runaway really doesnt exist. I mean it does. But very very very seldom. In series or parallel. I only know of one actual setup that had true thermal runaway that I've seen posted. Yes theres higher voltage in series. But depending on what your doing parallel will not always be the best option. The best circuit design there is. Is Series - Parallel.
 
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