Gradient Glow

var colors:Array = [0xFF0000, 0x666699, 0x223322, 0xCCCCDD, 0xFFEEFF];
var alphas:Array = [0, 1, 1, 1, 1];
var ratios:Array = [0, 50, 100, 200, 255]
var filter:GradientGlowFilter = new GradientGlowFilter(0, 0, colors, alphas, ratios, 30, 30, 1, 2, "full", true);
 
var circles:Shape = new Shape();

 for (var i:int = 0; i<30; i++){
  with(circles.graphics) beginFill(0xFF0000), drawCircle(Math.random()*500, Math.random()*400,10+Math.random()*40);
 }
 addChild(circles);
 
 circles.filters = [filter];

I don’t see GradientGlowFilter used much. But with some tweaking you can probably get some decent stuff out of it.