example_individual_setBrightness.ino

#include <FastLED.h>

#define LEDS_SIDE_LEN 29
#define LEDS_SIDE_NUM 3
#define NUM_LEDS_LEFT (LEDS_SIDE_LEN*LEDS_SIDE_NUM)
#define NUM_LEDS_RGHT (LEDS_SIDE_LEN*LEDS_SIDE_NUM)

#define NUM_LEDS_CNTR 96

CRGB ledsLEFT[NUM_LEDS_LEFT];
CRGB ledsCNTR[NUM_LEDS_CNTR];
CRGB ledsRGHT[NUM_LEDS_RGHT];

#define LED_PIN_LEFT 2
#define LED_PIN_CNTR 3
#define LED_PIN_RGHT 4

uint8_t br[3];

void setup()
{
  delay(3000);
  LEDS.addLeds<WS2811, LED_PIN_LEFT, GRB>(ledsLEFT, NUM_LEDS_LEFT);
  LEDS.addLeds<WS2811, LED_PIN_CNTR, GRB>(ledsCNTR, NUM_LEDS_CNTR);
  LEDS.addLeds<WS2811, LED_PIN_RGHT, GRB>(ledsRGHT, NUM_LEDS_RGHT);
  
  br[0] = 32;
  br[1] = 128;
  br[2] = 64;
  // ledsLEFT   --->  .setBrightness(32);
  // ledsCNTR   --->  .setBrightness(128);
  // ledsRGHT   --->  .setBrightness(64);
  
  LEDS.show();  // push black
}

void loop()
{
  LEDS[0].setCorrection(CRGB(br[0],br[0],br[0]));
  LEDS[1].setCorrection(CRGB(br[1],br[1],br[1]));
  LEDS[2].setCorrection(CRGB(br[2],br[2],br[2]));
  // do LED stuff...
}