Cobs or QB which has better coverage

Which is better cobs or wb

  • Cobs

    Votes: 19 45.2%

  • Qb

    Votes: 23 54.8%
  • Total voters
    42
ANC

ANC

Well-Known Member
Buy in 10's, you basically pay for 9 and get the 10th free.
Depending on the setup you could get pretty close for less money using Bridgelux gen 2...

Other members are more familiar with their performance and how many of those you would need.
 
whytewidow

whytewidow

Well-Known Member
ANC said:
Buy in 10's, you basically pay for 9 and get the 10th free.
Depending on the setup you could get pretty close for less money using Bridgelux gen 2...

Other members are more familiar with their performance and how many of those you would need.
Click to expand...
I can' find the fb24bs in 3000k anywhere
 
ANC

ANC

Well-Known Member
They will be in stock again on 28 March. Will give you some more time for researching
 
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Dave455

Well-Known Member
ANC said:
Lets say we just use them at Typical voltage and current.
For the FB24Bs I'm using if I were to drive my ten of them at 100W each to match your 1000W HID, they will be putting down about 170 000lumen.
Click to expand...
what are par/ppfd readings ?
 
nfhiggs

nfhiggs

Well-Known Member
whytewidow said:
FB24 gen 3s are 4345-9300 lumen max according to digikey I believe. So you would need 13.9 of them driven to the max to make 130,000 lumens. So how are yours alot more. Bc that's awesome.
Click to expand...
The 44" double row strips have 288 diodes and put out 17,340 lm at test current. cost is only $48 each - $41 if you get 10 or more.
 
whytewidow

whytewidow

Well-Known Member
nfhiggs said:
Where are you? Digikey.com has them for $48 - none in stock at the moment though.
Click to expand...
They were the wrong ones. For 68 bucks. They have the 560mm length ones in stock. Debating on just ordering 8 of them. Wiring in sets of two in parallel. Then wiring them in series to the driver. Makes the same exact thing as the 1120mm ones.
 
ANC

ANC

Well-Known Member
Run them all in parallel, add an 0.1 ohm to each string to balance current and give you something to actually measure current over (by measuring voltage and applying Ohm's law).
 
nfhiggs

nfhiggs

Well-Known Member
whytewidow said:
They were the wrong ones. For 68 bucks. They have the 560mm length ones in stock. Debating on just ordering 8 of them. Wiring in sets of two in parallel. Then wiring them in series to the driver. Makes the same exact thing as the 1120mm ones.
Click to expand...
If you are in the US get them from Arrow instead. Better price and free overnight shipping.
 
dabby duck

dabby duck

Well-Known Member
ANC said:
Run them all in parallel, add an 0.1 ohm to each string to balance current and give you something to actually measure current over (by measuring voltage and applying Ohm's law).
Click to expand...
.1 ohm resistor?
Can the anode leg run right to the 1st teminal of the diodes?
Does this make a physical connection like a shunt, to measure the current?......good idea may have to try it out immediately :joint:
 
whytewidow

whytewidow

Well-Known Member
nfhiggs said:
Where are you? Digikey.com has them for $48 - none in stock at the moment though.
Click to expand...

They habe 3500k in stock. 49 bucks. I' either gonna go eith 8 of the 560mm ones in 3000k. Or 4 of the 3500k ones. And add photo red and HE red pucks to the light frame. To bring the Kelvin down some.
ANC said:
It is just a simple series resistor before each strip.
Click to expand...
You meaning using a resistor if I use the 2 footers to make 4 footers?
 
whytewidow

whytewidow

Well-Known Member
Got my aluminum cut. Gotta sand it and paint it. Samsung strips will be here tomorrow. The reds will be here Thursday. They will go inbetween the samsungs. Nothing is bolted together yet. I ordered 30mm fans that will set in one end of the 2x2 square tubing to blow through it. To keep it cool. If i need to make another cut inbetween the ones i already cut. Hopefully all the slots cut in it will help dissipate heat from the strips.

Mock setup....
mir_20180305_190051.jpg
The second pic I flipped one over so you can see where the strips will be attached. I only cut 3 sides.
mir_20180305_190103.jpg
 
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