$fn=60;

difference() {
  union() {
    difference() {
      translate([-10,-10,-1]) {
        cube([20,20,20]);
      }
      // bulb cutout
      cylinder(h=20,d=5.2);
      // bulb base cutout
      translate([0,0,8]) {
        cylinder(h=12,d=6.2);
      }
    }
    // "anode" marker (it's not the anode on WS2812!)
    translate([2.6,-5,7]) {
      cube([2,10,12]);
    }
  }
  // JST ZH-4 cutout
  translate([-3.25,-2,16]) {
    cube([6.5,3,5]);
  }
  // JST ZH-4 alignment slot cutout
  translate([-4,-0.5,16]) {
    cube([8,1,5]);
  }
}