// this does compile!
#include "FastLED.h"
FASTLED_USING_NAMESPACE

#if defined(FASTLED_VERSION) && (FASTLED_VERSION < 3001000)
#warning "Requires FastLED 3.1 or later; check github for latest code."
#endif


#define DATA_PIN_L    14
#define CLK_PIN_L     12
#define DATA_PIN_R    13
#define CLK_PIN_R     15


#define LED_TYPE    APA102
#define COLOR_ORDER BGR
#define LED_COUNT       340
#define LED_COUNT_LEFT  170
#define LED_COUNT_RIGHT 170
CRGB leds[LED_COUNT];
//CRGB LEFT[LED_COUNT_LEFT];
//CRGB RIGHT[LED_COUNT_RIGHT];

#define BRIGHTNESS       128
CLEDController *LEFT;
CLEDController *RIGHT;
void setup() {

  delay(1000);
  LEFT  =  &FastLED.addLeds<LED_TYPE,DATA_PIN_L,CLK_PIN_L,COLOR_ORDER>(leds, LED_COUNT_LEFT).setCorrection(DirectSunlight);
  RIGHT =  &FastLED.addLeds<LED_TYPE,DATA_PIN_R,CLK_PIN_R,COLOR_ORDER>(leds, LED_COUNT_RIGHT).setCorrection(DirectSunlight);

  FastLED.setBrightness(BRIGHTNESS);

}

void loop () {
 LEFT->showLeds(255);
 RIGHT->showLeds(128);
  }