Light example: 

#define ZIGBEE_LIGHT_ENDPOINT 11
#define ZIGBEE_LIGHT_ENDPOINT2 12

ZigbeeLight zbLight = ZigbeeLight(ZIGBEE_LIGHT_ENDPOINT);
ZigbeeLight zbLight2 = ZigbeeLight(ZIGBEE_LIGHT_ENDPOINT2);


void setup() {
  Serial.begin(115200);

  // Init LED and turn it OFF (if LED_PIN == RGB_BUILTIN, the rgbLedWrite() will be used under the hood)
  pinMode(led, OUTPUT);
  digitalWrite(led, LOW);

  // Init button for factory reset
  pinMode(button, INPUT_PULLUP);

  //Optional: set Zigbee device name and model
  zbLight.setManufacturerAndModel("Espressif", "ZBLightBulb");
  zbLight2.setManufacturerAndModel("Espressif", "ZBLightBulb2");

  // Set callback function for light change
  zbLight.onLightChange(setLED);
  zbLight2.onLightChange(setLED2);

  //Add endpoint to Zigbee Core
  Serial.println("Adding ZigbeeLight endpoint to Zigbee Core");
  Zigbee.addEndpoint(&zbLight);
  Zigbee.addEndpoint(&zbLight2);

  // When all EPs are registered, start Zigbee. By default acts as ZIGBEE_END_DEVICE
  if (!Zigbee.begin()) {
    Serial.println("Zigbee failed to start!");
    Serial.println("Rebooting...");
    ESP.restart();
  }
  Serial.println("Connecting to network");
  while (!Zigbee.connected()) {
    Serial.print(".");
    delay(100);
  }
  Serial.println("Connected");
  zbLight.printBoundDevices(Serial);
  zbLight2.printBoundDevices(Serial);
}

Switch Example is untouched.