if I measure it without limiting
What is that supposed to mean?Do you mean to tell us you connected that LED to a random power supply without the current control circuitry that you know is essential from your reading of the threads here?
You are saying it in a way like I've connected my dog to a random power supply.
It is just a small piece of plastic. I was checking if it works or not. It is a 100W led but it was consuming just 2A maximum.
I'm sure it's going to consume more after it get hotter, but the question is different. How can I limit the current if I don't know which current it needs per channel?
Does anybody ever has something to do with this kind of led?
I found one topic here and if linked me to this. But I can't find it in my country. I can recreate it myself. But still I don't know the value I should to limit the current to for each channel. I may assume it is just 2.78/3A, but I'm not sure.
Interesting comparison, but - yes!I'm not quite sure what you are saying here.Is that with all three channels in parallel?A 100 W RGB LED would obviously use 33 W in each channel - more or less. At about 33 V that would be about 1 Amp each. So it is either massively over-driving one channel, or under-driving three.
But you simply cannot connect all three in parallel because the three colours have significantly different voltage drops so the red would be bright and consuming almost all of the current but the other two colours very dim.
That is a nicely designed board. It has three switchmode current regulators with PWM applied by a transistor each from a WS2811 chip. Yes, that is what yours should look like. Replicating it yourself is not advisable given your present state of knowledge (as in - you would not be asking these questions if you had the expertise to do it! ) It may well not be available in your country - that is why you buy it by mail order from Tindie!)
If you want quality light source for filming, an RGB led is not the ideal choice, you'll getsignificant colour distortion. Art-gallery grade white LEDs are more what you want, they use a range of phosphors to generate a sunlight-like broadband spectrum.RGB is however better than cheap white LEDs which have a gap in the spectrum.However RGB will be less power efficient than almost any white LED.To control the RGB style you'll need to be able to trim the relative currents for the coloursto set neutral white - normally three adjustable constant current sources would be used.