void setup() {
  // put your setup code here, to run once:
pinMode(1, OUTPUT);
}

  // These constants should match the photoresistor's "gamma" and "rl10" attributes
  const float GAMMA = 0.7;
  const float RL10 = 50;

void loop() {
  // put your main code here, to run repeatedly:
int LUXval=analogRead(A1); // reading the sensor value

//Convert the analog value into lux value
  float voltage = LUXval / 1024.0 * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));

// making the desicion
  if (lux<800){
    digitalWrite(1, HIGH);
    delay(500);
  }
  else{
    digitalWrite(1, LOW);
    delay(500);
  }
}