Whats the most efficient deep red chip?
Stephenj37826
Well-Known Member
Osram square is most efficient. That's what we are using in RSpec ...... Real results from sphere tests.........
PSUAGRO.
Well-Known Member
How about you tell the people what those o$ram Oslon Square top group/bin diodes go for in BULK stephen? Should raise some eyebrows ; )
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whats umol/j for them ? not too be a pita but you are claiming the "most efficient" ….
@Stephenj37826
When do you get the QB288 V2 Rspec back in stock? Are you planning to replace the 16 Osram SLL with Cree 660?
Maybe in a V2a or V3?
Thanks
Maybe. Still waiting on a quote (been 2 months). The osram square is pretty darn good and at 250ma where we run the monos I would say there is very little difference. A sphere test will tell
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nachooo
Well-Known Member
Some data in this link at least regarding the osram square they sell...as they are osram partners...I supose they are good bins
https://www.led-tech.de/en/Osram-OSLON-Square-hyper-red-on-SYSTEM-Slider
Greengenes707
Well-Known Member
The XPG3 is the most efficient deep red chip currently. Second is the osram square. It's close, but that's the way the cookie crumbles top bin to top bin.
But to add to it, XPG3 can actually get top bin specific and not a group of 3 bins like the osrams.
But to add to it, XPG3 can actually get top bin specific and not a group of 3 bins like the osrams.
Stephenj37826
Well-Known Member
There are 2 different part numbers for deep red square......
whytewidow
Well-Known Member
The osram out performs cree reds. I have strips of both. Made up from individual diodes. That i purchased from legit sources. I've run both on the set of Samsung 12 lm301b 3k strips, 6 Samsung f562b Lm561c S6 2700ks. 4 strips of a reds on it. First run with crees. Second run with osrams. Granted it wasnt side by side. But same clone run twice. Second had visually more trich production especially on bigger fans. But under osrams I had way less stretch between nodes. They were both run on the same exact driver. Lpv60-24 just the red swapped out. As far as being efficient I cant say other then by datasheet. But by actual use. And my red crees are in the closet. So the arguement over which is more efficient. Is minut. Osrams for me out perform hands down.
Stephenj37826
Well-Known Member
Stephenj37826
Well-Known Member
Less than Cree..... Lol
I'm not even sure if cree got back with us on a price for the xp3.
Sammy's new 2 watt reds are not half bad either. Funny part in real world numbers and the relative low overall percentage of red we use ( ~10% ) it really is splitting hairs.
The tariff situation has really slowed down Samsung's process improvements. Was supposed to see a better bin nearly a year ago.
welight
Well-Known Member
Greengenes707
Well-Known Member
I know...And??? doesn't change things. The XPG3 is more efficient than all order codes and bins of the osram square.
Feel free to put data to your words. If it's a visual things...then show it. Show the boards even.
Nice.
Stephenj37826
Well-Known Member
How are you arriving at that? Just mw output at a specific current? VF of the square is 10% lower than the cree at same current. ..... Thermal droop seems to go to Cree but what we have seen thus far is Osram under promising and over delivering. We are seeing 70% efficiency at chip level.......
whytewidow
Well-Known Member
I have several posts on here and iG. Showing the osrams outperform crees. I'm not getting into your pissing match. But just to appease you
This was run under my strips and osram reds. I'm not a company. I'm DIY.
Greengenes707
Well-Known Member
A bunch of pics? They look good but what are they showing?
Cree what? This is about the XPG3 photo red. Not the E or E2. What are the PCB setup?
whytewidow
Well-Known Member
Same strain run under same light except with cree reds.
Greengenes707
Well-Known Member
What cree red do you keep generically referencing? What was the setup, drive currents were you running and how many diodes?
Your pics don't show anything comparing: timing, lighting, similar budds/angles all different so don't know what that shows. But nice buds.
BCBLondesLEDGrowLights
Well-Known Member
probably one of the worst ways to compare lights is a side by side done once. If you want to use side by sides to compare efficiency or light output from a light you have to do the test over and over, run it 5 times with each set of reds and compare averages. AND don't use ONE CUT, use 9 or 16 of the same cut. Ive run 100 cuts in the same room under the same lights with the same feed from the same mother and gotten good and bad plants. If a sphere is unavailable next best bet is a par map, then a side by side IMHO. Not trying to be negative, just trying to point this out.
ChiefRunningPhist
Well-Known Member
OSRAM "Typical" electrical conditions..
2.07V, 0.35A, 0.7245W
CREE "Typical" electrical conditions...
1.99V, 0.35A, 0.6965W
OSRAM "Typical" μmol/J...
3.91μmol/J
3.91μmol/J(typ)× 0.7245W(typ)
=
2.83μmol/s(typ) @ 0.7245W(typ)
CREE "Typical" μmol/J...
4.13 μmol/J+
2.88μmol/s(min) ÷ 0.6965W
=
4.13μmol/J+
.
~2.88μmol/s+(typ) @ 0.6965W(typ)
This is what I've been going off of...
2.07V, 0.35A, 0.7245W
CREE "Typical" electrical conditions...
1.99V, 0.35A, 0.6965W
OSRAM "Typical" μmol/J...
3.91μmol/J
3.91μmol/J(typ)× 0.7245W(typ)
=
2.83μmol/s(typ) @ 0.7245W(typ)
CREE "Typical" μmol/J...
4.13 μmol/J+
2.88μmol/s(min) ÷ 0.6965W
=
4.13μmol/J+
.
~2.88μmol/s+(typ) @ 0.6965W(typ)
This is what I've been going off of...