Hello,
Try
Adafruit_NeoPixel strips[] =
{
Adafruit_NeoPixel(LED_COUNT, LED_PIN0),
Adafruit_NeoPixel(LED_COUNT, LED_PIN1),
...
};
size_t numStrips = sizeof(strips) / sizeof(Adafruit_NeoPixel);
...
for ( uint8_t i = 0; i < numStrips; i++ )
{
strips[i].begin();
strips[i].show();
...
}