I have been getting some help with how to organise my code better and

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I have been getting some help with how to organise my code better and they are suggesting I use struct arrays to hold data relating to the LEDs - I have several instances where I use the NUM_LEDS value in arrays that could be grouped. Would there be any problems including CRGB in this struct array?

I’m not sure if I have described the question properly, but the advice I was given was at http://forum.arduino.cc/index.php?topic=382224.45 but he didn’t know much about FastLED and wasn’t sure if it would cause a problem.

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Yes there would - addLeds expects a set of data that is just a string of CRGB objects - so at the very least you will need 2 arrays, one that has the CRGB objects, and one that has all the other data that you want to track.