#define photo 8
int light = 8;

void setup() {
  pinMode(8, INPUT);
  pinMode(5, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(3, OUTPUT);
}

void loop() {
  light = digitalRead(photo);
  if (light == HIGH) {
    digitalWrite(5, HIGH);
    digitalWrite(4, HIGH);
    digitalWrite(3, HIGH);
  }else{
    digitalWrite(5, LOW);
    digitalWrite(4, LOW);
    digitalWrite(3, LOW);
  }
}