thanks fernando is work very fine... 
 -------------------------------- Last edited Tue May 15, 2018 6:19 pm  -------------------------------- 
 sorry sir...i need your help 
in cloud condition  min and max, i need led is pwm min is '"0" and condition max is "255", i try to change this code but, result fail.
void executeRelampago(byte i)
{
  myAnalogWrite(pinoLED[i], random(pwm_nuvem[i], 126)); // Pequena oscilação
  delay(random(25, 75));
  myAnalogWrite(pinoLED[i], random(126, 175)); // Pequena oscilação
  delay(random(25, 50));
  myAnalogWrite(pinoLED[i], 0); // Luz media ===> 126 change to 0
  delay(random(50, 100));
  myAnalogWrite(pinoLED[i], 255); // Luz alta
  delay(random(100, 200));
  myAnalogWrite(pinoLED[i], 0); // Luz media  ===> 126 change to 0
  delay(random(50, 100));
  myAnalogWrite(pinoLED[i], pwm_nuvem[i]); // Luz normal
#ifdef USE_EXTRA_CHANNEL_FOR_LIGHTNING_DURING_NIGHT
  if ((relampagoNoturno == true) && (i == EXTRA_CHANNEL_FOR_LIGHTNING))
  {
    delay(random(50, 100));
    myAnalogWrite(pinoLED[i], valorAnterior);
  }
#endif
}