LIFX light bulb control from Google Apps Script, sunrise, sunset and holiday colors. Full instructions at https://ithoughthecamewithyou.com/post/control-lifx-wifi-light-bulbs-from-google-apps-script

Code.gs

var LifxToken = '';
var LifxSelector = '';
var Latitude = 37.7749;
var Longitude = -122.4194;
var OnHour = 6;
var OffHour = 23;
var DaytimeOffsetMins = 25;
var DefaultOnColor = 'kelvin:2700';
var DefaultBrightness = 0.75;
var DefaultFadeSeconds = 10.0;

function nightSchedule() {
  // credit to https://sunrise-sunset.org/api for this simple API
  var result = UrlFetchApp.fetch('https://api.sunrise-sunset.org/json?lat=' + Latitude + '&lng=' + Longitude + '&formatted=0');
  var resultJson = JSON.parse(result);
  var sunrise = addMinutes(new Date(resultJson.results.sunrise), DaytimeOffsetMins);
  var sunset = addMinutes(new Date(resultJson.results.sunset), -DaytimeOffsetMins);
  
  var earlyOn = todayWithTime(OnHour, 0);
  var sunriseOff = todayWithTime(sunrise.getHours(), sunrise.getMinutes());
  var sunsetOn = todayWithTime(sunset.getHours(), sunset.getMinutes());
  var lateOff = todayWithTime(OffHour, 0);
  var now = new Date();

  console.log('On at (morning): ' + earlyOn);
  console.log('Off at (morning): ' + sunriseOff);
  console.log('On at (evening): ' + sunsetOn);
  console.log('Off at (evening): ' + lateOff);
  console.log('Time now: ' + now);

  var color = DefaultOnColor;
  var nowDay = now.getDate();
  var nowMonth = now.getMonth() + 1;

  var lightsOnCheck = false; 

  // if sunrise is later than the early on time (otherwise no morning light needed) then on between earlyOn and sunriseOff
  if (sunriseOff > earlyOn) {
    if ((now >= earlyOn) && (now <= sunriseOff)) {
      lightsOnCheck = true;
    }
  }

  // in the evening on between sunsetOn and lateOff
  if ((now >= sunsetOn) && (now <= lateOff)) {
    lightsOnCheck = true;

    // check for holidays
    if ((nowMonth == 12) && ((nowDay == 24) || (nowDay == 25))) {
      color = christmasColor();
    }

    if ((nowMonth == 10) && (nowDay == 31)) {
      color = halloweenColor();
    }
  }
  
  if (lightsOnCheck) {
    lightsOn(color);
  } else {
    lightsOff();
  }
}

function lightsOn(color) {
  // color formats https://api.developer.lifx.com/reference/colors
  console.log('Switching ' + LifxSelector +  ' ON: ' + color);
  var request = {
    "power": "on",
    "color": color,
    "brightness": DefaultBrightness,
    "duration": DefaultFadeSeconds,
    "fast": true
  };
  sendControl(request);
}

function lightsOff() {
  console.log('Switching ' + LifxSelector +  ' OFF');
  var request = {
    "power": "off",
    "duration": DefaultFadeSeconds,
    "fast": true
  };
  sendControl(request);
}

function sendControl(jsonRequest) {
  UrlFetchApp.fetch('https://api.lifx.com/v1/lights/' + LifxSelector + '/state', {
    headers: {
      Authorization: 'Bearer ' + LifxToken
    },
    'method' : 'put',
    'contentType' : 'application/json',
    'payload' : JSON.stringify(jsonRequest, null, 2)
  });
}

function christmasColor() {
  switch(Math.floor(Math.random() * 4)) {
    case 0:
      return '#225140';
    case 1:
      return '#2d6d5c';
    case 2:
      return '#85010b';
    default:
      return '#a11616';
  }
}

function halloweenColor() {
  switch(Math.floor(Math.random() * 4)) {
    case 0:
      return '#cc280e';
    case 1:
      return '#ec5b07';
    case 2:
      return '#f08b18';
    default:
      return '#54248c';
  }
}

function addMinutes(date, minutes) {
    return new Date(date.getTime() + minutes*60000);
}

function todayWithTime(hour, minute) {
  var mydate = new Date();
  mydate.setHours(hour);
  mydate.setMinutes(minute);  
  mydate.setSeconds(0);
  return mydate;
}