Is this a Vero 29 killer?

JorgeGonzales

JorgeGonzales

Well-Known Member
choomer said:
I think you're forgetting the 6 2" fans mounted to the front/back of that server case (and the power supply fan) that create a dedicated channel of airflow through the case and over the heatsink so it's not really the same as getting hit once every 10 seconds by an oscillating fan.
I know of no HP server (standalone/rackmount/blade) that doesn't sound like a 747 starting up due to fans.

That said, you could mount the heatsinks in a 5" rail with a fan on one end and simulate that type of design for airflow over multiple sinks and keep them well cooled.

EDIT; Forgot to say thanks to Jorge for his research into Citis!
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This is what I was alluding to, but couldn't be bothered. A picture is enough to see that it needs airflow, but I knew exactly what was up as soon as they said DL380.

Oh, and you are welcome. They have potential to really lower the cost of entry I think. The new Veros should also be exciting, but I'm not sure if they'll keep up in the $15 range, or have any answer to the 058 series. It'll be fun comparing.
 
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voon

Well-Known Member
JorgeGonzales said:
OK, as far as 90CRI, I think this is the chart we need to be looking at:
View attachment 3702915

Notice how it says Ra90(on) aka H6K2 models. The other chart doesn't specify, and by the lower PPF numbers, I am guessing that it was Ra90(below) aka H6K2, although this is only speculation.

Oh, the point being the 90CRI PPF numbers are higher.
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Please allow me to respond .. table from that issued the prospectus is not very meaningful .. it is a calculation of the older generation chip ver.3 where spectrum was compared ver.5 very different .. similarity only in the event of a 3500k CRi90,80 .. for us, however, is the preferable option .. so I would rather focus attention on the table for ver.5 is more meaningful current reality
 
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voon

Well-Known Member
.. As regards the A-PPF what seems wrong? I know that is not entirely accurate, since it is derived from photosyntetic curve of chlorophyl A, B, and that after all is also based McCree, which encompasses other regions in the PAR (PPF) .. There is unaccounted green region of the spectrum and the yellow part with a share of 10 -20% .. will someone from the local very knowledgeable and able to create their own, more appropriate and meaningful similar magnitude in terms of a-PPF offsetting region green, yellow, .. or as I saw in another thread a percentage value range or the amount of energy for each spectrum according to the graph of the SPD? .. However in the table PPF still have a very interesting offer higher CRi90 therefore mainly 4000K for growth ..osobně I think 3500k 90CRi might not be a bad choice at all in combination with 3500k 80CRi .. peak at 630 nm and a high proportion of 600-680nm including FR
.. Finally finishing these topic about this
voon said:
I was based on data from A-PPF .. or I understand it wrong and are thus mistaken .. I like to let repair and make thing right path
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JorgeGonzales

JorgeGonzales

Well-Known Member
voon said:
Please allow me to respond .. table from that issued the prospectus is not very meaningful .. it is a calculation of the older generation chip ver.3 where spectrum was compared ver.5 very different .. similarity only in the event of a 3500k CRi90,80 .. for us, however, is the preferable option .. so I would rather focus attention on the table for ver.5 is more meaningful current reality
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The problem is the version 5 chart doesn't specify which 90CRI version it is, and the 034 chart does. The question is whether 90CRI on BBL version can match the umol/J of 80CRI, and here is proof it was happening two generations ago,
 
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voon

Well-Known Member
JorgeGonzales said:
The problem is the version 5 chart doesn't specify which 90CRI version it is, and the 034 chart does. The question is whether 90CRI on BBL version can match the umol/J of 80CRI, and here is proof it was happening two generations ago,
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I understand this is .. about ver.3 specified current, which runs compared clu058-1825 relatively soft, but again in that range with a test current is somewhere in the middle range of the chip .. what will affect current runs the chip if soft or hard to spectral shift in certain colored temps, CRi and spectrum? thx
 
Malocan

Malocan

Well-Known Member
JorgeGonzales said:
The problem is the version 5 chart doesn't specify which 90CRI version it is
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hi,
if you talk about this chart which i post now, then i think the chart does specify indirectly which 90 cri version it is. I think it is Ra90 on B.B.L version, because the chart is for CLU058-1825C4 and CLU058-3618C4. for this both version dont exist a Ra90 below B.B.L. version.
 

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JorgeGonzales

JorgeGonzales

Well-Known Member
Malocan said:
hi,
if you talk about this chart which i post now, then i think the chart does specify indirectly which 90 cri version it is. I think it is Ra90 on B.B.L version, because the chart is for CLU058-1825C4 and CLU058-3618C4. for this both version dont exist a Ra90 below B.B.L. version.
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Well shit, you are right. Thank you. I saw the model numbers listed in the simulation spreadsheet, but didn't look to see if the models existed.

So that leaves questions...like how my umol/J comparison is so far off, especially since @alesh said he got the similar results.
 
JorgeGonzales

JorgeGonzales

Well-Known Member
Although the difference between 2700K 80CRI and 90CRI is only about 4.5% according to the Citizen PPF numbers, and nothing about 700nm is being included. Could explain it, perhaps.
 
klx

klx

Well-Known Member
Guys,

After many, many, many emails back and forth with the AU Citizen distro and him being at times quite confused with why I wanted certain things, he has quoted me below, what do you guys reckon? Looks pretty good but I think I will tweak it slightly and get a few extra COBs, heatsinks and holders and ditch the Angelinas for now. Will also try to squeeze him on the freight if I can.

The total cost is for 4 x 10 COB lights.

Citi quote.jpg
 
JorgeGonzales

JorgeGonzales

Well-Known Member
That's almost identical to my build...although I used 4 cobs per driver, instead of one huge one. Looks fine to me.

I will say, have you considered the 1825? It would be a much cheaper and easier build. Well...no, about the same I guess, price wise. But you could run 4 instead of 10.

Also, that's 3x what CDI charged for holders. Weird.
 
klx

klx

Well-Known Member
Well originally, the issue was the MOQ so I had not considered them but now he seems to be happy to make something work to get my money.

How would you change the config?
 
JorgeGonzales

JorgeGonzales

Well-Known Member
klx said:
Well originally, the issue was the MOQ so I had not considered them but now he seems to be happy to make something work to get my money.

How would you change the config?
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Well, it would be an easier build, but I have no idea who you are dealing with or what they stock. Finding a 70W or 100W heatsink might be challenging, and his prices might not be good on the 1825.
 
JorgeGonzales

JorgeGonzales

Well-Known Member
image.jpg

As you can see on my super secret spreadsheet, even at 2100ma the 1825 is the same efficiency as the 1212 @ 1050ma. So you could run 4 on that driver and be a bit more efficient, if you had the heatsink to do it. And you'd save some on the heatsinks you didn't have to buy, to buy bigger ones. These are good prices.
 
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voon

Well-Known Member

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