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weed-whacker

weed-whacker

Well-Known Member
so i am infact in need of some info.

Id like to know how many watts of what cob at what current to get enough light.

I could calculate this with eff % for the citizens?


cheers
 
Rayne

Rayne

Well-Known Member
weed-whacker said:
so i am infact in need of some info.

Id like to know how many watts of what cob at what current to get enough light.

I could calculate this with eff % for the citizens?

cheers
Click to expand...
Your answer depends on your chosen COB's voltage requirements? You can build a LED array with four COBs with a driver that outputs 200 watts. However all four COBs will only turn on if the driver outputs enough forward voltage.

Amperage is just a measure of how strong the current is. Which leads to more intense light.
 
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weed-whacker

weed-whacker

Well-Known Member
Rayne said:
Your answer depends on your chosen COB's voltage requirements? You can build a LED array with four COBs with a driver that outputs 200 watts. However all four COBs will only turn on if the driver outputs enough forward voltage.

Amperage is just a measure of how strong the current is. Which leads to more intense light.
Click to expand...

Maybe my question wasn't clear


What are the eff % of the citizen cobs?

And yes, I've built about 20 panels so far, been at it since w were using monos, but thanks
 
Rayne

Rayne

Well-Known Member
weed-whacker said:
Maybe my question wasn't clear

What are the eff % of the citizen cobs?

And yes, I've built about 20 panels so far, been at it since w were using monos, but thanks
Click to expand...
Once again, your answer depends on the chosen diodes.

Here are some of the many PDF datasheets provided by the manufacturer.
CLU048-1212 CRI 70 and 80
CLU048-1212 CRI 90
CLU048-1818 CRI 70 and 80
CLU048-1818 CRI 90

CLU058-1825 CRI 70 and 80
CLU058-1825 CRI 90
CLU058-3618 CRI 70 and 80
CLU058-3618 CRI 90

For future reference. Do not expect everyone to just give you the answer to every question you can think of. At some point in your life your web searching skills need to improve so that you can find the data you seek.
 
Abiqua

Abiqua

Well-Known Member
weed-whacker said:
Maybe my question wasn't clear


What are the eff % of the citizen cobs?

And yes, I've built about 20 panels so far, been at it since w were using monos, but thanks
Click to expand...
I calculated some in the very 1st pages of the 1st citizen thread.

The type of attitude that is bullshit around here, is the non-help displayed by some. Its just a math problem. Share it. This isn't fucking school,. There will be no demerits for asking a question.

Some are not built for teaching :peace:
 
optzulu

optzulu

Well-Known Member
what are the shipping costs for 6 citizen chips to EU ? you can just put them in a bubble envelope ?
 
Greengenes707

Greengenes707

Well-Known Member
Abiqua said:
I calculated some in the very 1st pages of the 1st citizen thread.

The type of attitude that is bullshit around here, is the non-help displayed by some. Its just a math problem. Share it. This isn't fucking school,. There will be no demerits for asking a question.

Some are not built for teaching :peace:
Click to expand...
They act as if they have done all the calculations in the past wth non-citi's too and no one showed them EVERYTHING. Their hands were held, lead to water, and spoon feed it all. But god forbid they answer a simple question about the new and un-shown things they push.
So the sales pitch is to say they will work based on the others that actually used a similar, but still different product...sure ok, sounds like a really confident product with results and promise galore.


Or is the fact that all those original members that did the work and actually used the product are no longer here to do it for people/companies?
 
JorgeGonzales

JorgeGonzales

Well-Known Member
weed-whacker said:
What are the eff % of the citizen cobs?
Click to expand...
These are the only numbers I've seen, courtesy of um, me: http://rollitup.org/t/cheap-and-cheerful-diy-using-citizen-cobs.909460/page-13#post-12802292

Again, these are the numbers according to Citizen and their SPD charts. Real world results may vary, but calculating efficiency/PPF with these charts would likely result in a decent conservative estimate.

Remember, the Cree numbers everybody quotes are from @SupraSPL, not Cree. Nobody has confirmed 56% or 60% or any goddamned thing. Lot of talk from vendors about sphere testing their fixtures, no acual results yet, unless I missed them. Certainly possible.
 
Greengenes707

Greengenes707

Well-Known Member
JorgeGonzales said:
These are the only numbers I've seen, courtesy of um, me: http://rollitup.org/t/cheap-and-cheerful-diy-using-citizen-cobs.909460/page-13#post-12802292

Again, these are the numbers according to Citizen and their SPD charts. Real world results may vary, but calculating efficiency/PPF with these charts would likely result in a decent conservative estimate.

Remember, the Cree numbers everybody quotes are from @SupraSPL, not Cree. Nobody has confirmed 56% or 60% or any goddamned thing. Lot of talk from vendors about sphere testing their fixtures, no acual results yet, unless I missed them. Certainly possible.
Click to expand...
Supra original were based on his, mr flux, and SDS calcs. And they have not been used since years before you were ever a member. Cree responded with their own figures which were within .009% of the RIU team calcs.
And it is these confirmed numbers that todays spread sheets are based of. Numbers all from cree and their instruments from the data sheet. And again confirmed by multiple parties within .009% error.
And can be again confirmed by the PCT using the min figures.
 
CobKits

CobKits

Well-Known Member
Greengenes707 said:
But god forbid they answer a simple question about the new and un-shown things they push.
So the sales pitch is to say they will work based on the others that actually used a similar, but still different product...sure ok, sounds like a really confident product with results and promise galore.
Click to expand...
not sure who that was addressed to.

Raynes not selling anything

I provided a link to manufacturer simulator and took no attitude with anyone. I'm happy to answer any questions i can and provide the data we do have, but nobodys making claims that arent backed up.
 
weed-whacker

weed-whacker

Well-Known Member
Rayne said:
Once again, your answer depends on the chosen diodes.

Here are some of the many PDF datasheets provided by the manufacturer.
CLU048-1212 CRI 70 and 80
CLU048-1212 CRI 90
CLU048-1818 CRI 70 and 80
CLU048-1818 CRI 90

CLU058-1825 CRI 70 and 80
CLU058-1825 CRI 90
CLU058-3618 CRI 70 and 80
CLU058-3618 CRI 90

For future reference. Do not expect everyone to just give you the answer to every question you can think of. At some point in your life your web searching skills need to improve so that you can find the data you seek.
Click to expand...
Don't be such a fucktard

I'm asking for eff to calculate ppfd not lumens per watt at typical drive current

Dumb ass
 
J

Jimsmut

Well-Known Member
Appears the RIU code is expired...Any chance of it coming back? I have built a small veg light with 10w chips and am looking forward to playing with some 1818s! Thanks to all the RIU members for working on and sharing all the info!

Cheers,
Jim
 
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