Second to 660nm, is Infrared at 940nm which uses infrared heat to penetrate deep into tissues and force out unhealthy toxins in a person's body - especially in the fat cells where heavy metals and other chemicals that normally do not purge out through sweat in a conventional sauna or steam room.Non-coherent l.e.d.'s do not have the same risk as coherent lasers, and l.e.d. units are being used to tr