bridge-troll-suncalc.js

  //Get date and sunrise and sunset times. Compare current time against sunrise and sunset times. Set to night mode.
  var date = new Date('2018-03-16T23:59:59.000Z');
  var sunTimes = SunCalc.getTimes(date, lat, lng);
  log.info('Current date and time is:' + date + '\nTime for sunset is:' + sunTimes.sunset);
  if (date > sunTimes.sunriseEnd && date < sunTimes.sunset){
    log.info('The sun is up.');
    tileUrl = 'http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png'
  }else{
    log.info('The sun is down. Or error.');
  }