New Citizen CLU058-1825 Lamp From Northern Grow Lights

JorgeGonzales

JorgeGonzales

Well-Known Member
Shout out to @robincnn at Northern Grow Lights, he now has Photon 180 grow lights in stock with Citizen CLU058-1825 cobs.

https://northerngrowlights.com/products/photon-180clu1825

Preliminary testing from @BOBBY_G from here: https://www.rollitup.org/t/top-bin-cob-comparison-2.897765/page-6#post-12764656

image.jpg

This shows, tentatively, the 1825 well ahead of the CXB3590 at 80W, matching the CXB3590 DB at the ever popular 50W level. Looks like the same efficiency with 60% more output!

Keep in mind these are real-world steady state tests, so each cob is running at a slightly different temperature on a similar cooling setup. Crazy stuff, but basically the Photon 180 with two CLU058-1825 should be more efficient than the ever popular CXB3590 CD at 50W, for $2 a watt built. Good stuff.

Vero thermal resistance is much better than stated by Citizen however, and would favor the Vero in the Vero vs Citizen results. Cree's thermal resistance is unknown. More details in Bobby's post.

Also, notice the 3500K 90 CRI version. For you red/far red spectrum junkies this is very, very close to the 3500K 80 CRI in photon efficiency. The peak moves up to 630nm and there is a nice boost in far red.

Good stuff @robincnn. And thanks @BOBBY_G...bet you'll have even more news soon. Ahem.
 
JorgeGonzales

JorgeGonzales

Well-Known Member
Malocan

Malocan

Well-Known Member
robincnn said:
@JorgeGonzales Thanks :-D
CLU058-1825 is the top Photon 180 Lamp for now.
Will make a Photon with Vero 29B- Gen 7 @52V with Khatod Silicone when the new Vero 7 comes out.
Vero 29B 52V might be able to catch up with CLU058-1825
View attachment 3729846
@BOBBY_G Thanks for testing the cobs.

@NapalmD will be doing a journal with CLU058-1825 3500K 90 CRI version.
View attachment 3729854
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you offer really nice price for the CLU058-1825 at ur shop, even with cob holder8).
I noticed you are even the cheapest source for them:hump:
 
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JorgeGonzales

JorgeGonzales

Well-Known Member
robincnn said:
@JorgeGonzales Thanks :-D
CLU058-1825 is the top Photon 180 Lamp for now.
Will make a Photon with Vero 29B- Gen 7 @52V with Khatod Silicone when the new Vero 7 comes out.
Vero 29B 52V might be able to catch up with CLU058-1825
View attachment 3729846
@BOBBY_G Thanks for testing the cobs.

@NapalmD will be doing a journal with CLU058-1825 3500K 90 CRI version.
View attachment 3729854
Click to expand...
Yeah the numbers on paper are so close now, with Citizen under promising and over delivering, that head-to-head testing is needed. And real pricing data, and actual Vero availability. I thought they'd be at Digikey by now.
 
PSUAGRO.

PSUAGRO.

Well-Known Member
Not trying to be an asshole, but do we have any testing/confirmation on the #s other than Bobby's results.....I'm a little hesitant to believe.

Btw who officially makes the new veros now ? Epistar?
 
JorgeGonzales

JorgeGonzales

Well-Known Member
PSUAGRO. said:
Not trying to be an asshole, but do we have any testing/confirmation on the #s other than Bobby's results.....I'm a little hesitant to believe.

Btw who officially makes the new veros now ? Epistar?
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Naw, you are no more an asshole than me for saying the same thing in that crazy guy's thread. But it's a big LES, new gen cob with a lot of dies stuffed in there, so not a -huge- stretch.

I also don't love that (unlike Supra's eternally helpful tests and spreadsheets) current and temp droop are not separated with pulsed measurements, so doing Supra-style spreadsheets is not possible. But they certainly point in a good direction, and Bobby is awesome for doing this.
 
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Evil-Mobo

Evil-Mobo

Well-Known Member
JorgeGonzales said:
Naw, you are no more an asshole than me for saying the same thing in that crazy guy's thread. But it's a big LES, new gen cob with a lot of dies stuffed in there, so not a -huge- stretch.

I also don't love that (unlike Supra's eternally helpful tests and spreadsheets) current and temp droop are not separated with pulsed measurements, so doing Supra-style spreadsheets is not possible. But they certainly point in a good direction, and Bobby is awesome for doing this.
Click to expand...
Bobby is awesome for doing this and for always being willing to help despite how busy he is :hump:
 
BOBBY_G

BOBBY_G

Well-Known Member
Id be down with doing pulsed measurements if i could with any degree of accuracy. at high currents the numbers drop faster than i can observe them. trying to dial in an exact current and read a number in 1 sec just isnt possible. the only way i could really do it would be to datalog all parameters including PAR and look at them on a computer. maybe @SupraSPL will pop back here some day and explain how he did his measurements
 
JorgeGonzales

JorgeGonzales

Well-Known Member
BOBBY_G said:
Id be down with doing pulsed measurements if i could with any degree of accuracy. at high currents the numbers drop faster than i can observe them. trying to dial in an exact current and read a number in 1 sec just isnt possible. the only way i could really do it would be to datalog all parameters including PAR and look at them on a computer. maybe @SupraSPL will pop back here some day and explain how he did his measurements
Click to expand...
Wait, did I ask about min/max settings on your DMM, or did I dream that? I remember thinking it, but not necessarily typing it. But yeah, you could try that. Max voltage and PPFD should be instant, and then downhill from there.

Editing to add this: https://www.rollitup.org/t/cob-efficiency-spreadsheets.865238/page-22#post-12760527

Man short term memory loss is real, yo.
 
JorgeGonzales

JorgeGonzales

Well-Known Member
I'll check on a scope that there's no crazy voltage spike at power on when I get a chance. That would make me feel more comfortable recommending snagging the max value. Better than talking out my ass, anyway.
 
BOBBY_G

BOBBY_G

Well-Known Member
maybe its time fora better power supply. if i can forgo 120V (sorry 3618!), this seems a lot more accurate than what i have now.

4 digit display. memory! set in the voltage and current target and press a button to get right to it

3A:

http://www.ebay.com/itm/KORAD-KA6003P-Programmable-Precision-Variable-Adjustable-60V-3A-DC-Linear-Po-/131286137884?hash=item1e91437c1c:g:wgoAAOSw1DtXH6EL

5A (hello 1825!):

http://www.ebay.com/itm/KORAD-KA6005D-Precision-Variable-Adjustable-60V-5A-DC-Linear-Power-Supply-Dig-/111939646996?hash=item1a101f7614:g:Ln8AAOSw3mpXH6EL
 
BOBBY_G

BOBBY_G

Well-Known Member
this ones for Jorge! put my heatsink with an 1825 in the freezer for ya. brought it out and tested it. i wanted to see if PPFD/W was as sensitive as PPFD to temp droop (it should be diminished as voltage is falling as ppfd falls, partially offsetting the ppfd/W loss)

by my IR thermometer the first measurement shoulda been ~ -4C

I let the voltage fall as the temp increased and charted PPFD

at the end i stopped and let it cool down until the chip and heatsink were about 25C +/-1C, jammed it back up to 3.13A to grab a 25C 'pulse' to use as reference the last measurement taken is steady state temp in my usual setup. was only off by 1.6% at 3.13A. im gonna go test 25C pulse vs steady state with 2.0A now. ill bet PPFD/W is well under 1%

upload_2016-7-12_2-22-57.png
 
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