A led mystery ? how to connect?
It seems you might have some luck, googling 20W RGB turns up stuff that looks mostly like yours; so go through those links and try to find some info or call/email the sellers: google.com/search?q=20W+RGB&amp;tbm=isch

And I don't think the pinout is much of an issue.



On the other hand you might need different voltages for each color, same here, here, or here.

It seems like your voltage and current spec don't match anything visually similar found in that search; those are generally 300-350mA per chain/color and 18-20V for G &amp; B but only 10-15V for R.



In response to your questions in the comments: In all likelihood, those are simply DC voltages. Each of the three color chains is a series of 6 (it seems) LEDs. These three chains are connected as in the diagram below:







simulate this circuit &ndash; Schematic created using CircuitLab