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Match LED Brightness

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Kasper:

--- Quote from: tooki on November 05, 2019, 06:28:37 pm ---
--- Quote from: Kasper on November 05, 2019, 04:55:37 pm ---
--- Quote from: tooki on November 05, 2019, 10:20:14 am ---If you're starting by selecting two LEDs with similar rated output at the same current, as you did, then yeah, current tells you something.

--- End quote ---

Before accusing me of cherry picking my data, you should look at their site.  Relying on such a big assumption just shows you don't have a good argument.

--- End quote ---
:-DD
Bro, you lost the disagreement long ago. You made a claim that is readily disproven, and multiple people have done just that. You’re just making yourself look silly by digging in your heels on something that is so easily disproven.

Anyhow, I didn’t say you cherry picked your data. You selected LEDs with broadly similar light output. How that came to be is irrelevant. You chose randomly and so did I when I literally grabbed the closest catalog at hand. But the upshot is, your claim that LEDs of similar current will have similar brightness is plain and simply not true.

--- End quote ---

Once again you prove you have no good argument by choosing fallacies over details.

Nusa:
Keep in mind that fine-tuning by eye assumes that everyone that's going to use the device has the same eyes. Color perception varies greatly among the population.

codingwithethanol:
WOW!

Lot of replies, not sure how to respond but i'm at least glad I started an interesting line of discussion. For the time being i'm going to design the circuit with same color LEDs, but in the future i'd actually like to order a variety of SMD LEDs and settle this via experimental data once and for all. I'll bump this thread when the badges come in so keep an eye out.

Psi:

--- Quote from: Zero999 on November 05, 2019, 09:28:57 pm ---It sounds like a phosphor converted LED, similar to the one in the datasheet, I linked previously. Do you have the part number or data sheet?

--- End quote ---

My notes from back then are a bit of a mess.
But i think it was this one
https://www.digikey.com/product-detail/en/kingbright/WP7104SYC/754-1257-ND/1747656
I don't think it was a 'special' led.

I ordered around 30 different leds based on their datasheet specs and price.
Out of the 30 that one was the brightest for the least current.

Kasper:

--- Quote from: codingwithethanol on November 06, 2019, 05:04:23 am ---WOW!

Lot of replies, not sure how to respond but i'm at least glad I started an interesting line of discussion. For the time being i'm going to design the circuit with same color LEDs, but in the future i'd actually like to order a variety of SMD LEDs and settle this via experimental data once and for all. I'll bump this thread when the badges come in so keep an eye out.

--- End quote ---

I applaud your enthusiasm but I think a digikey search would be a more thorough way to settle it though even that is left open to arguments over how tightly it should be filtered for package size, viewing angle, current, cost, etc.

On a side note, I am interested what the part numbers were for the 2 LEDs that you were talking about at the start of this.  That is too small of a sample to really prove anything, but I am curious.

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