The folks are telling you correctly about the military technique, especiallyGreg/MO. The easiest way to remember is: Light on low/Dark on High, can't get any simplar than that. With that said, go with thehead net/face mask if you can afford to, they are so much easier to take off and in hot weather won't make youstickey and sweat as much. That's just my opinion andI'm sure I'lltake a hit for sayingit but it's something to think about.