A comfortable heat source for your muscles Optimal penetration into skin and muscles for ultimate relief of muscular pain 90% of energy transmitted as infrared heat Instant, accurately controllable source of radiant heat Features Reflector shape allows concentrated heat to be applied where it is needed. PAR38 has a 100% aluminized internal reflector, which means that 100% of the heat leaves via the front. PAR38 has a small, round filament, which also contributes to more concentrated heat in the beam. Good balance between lifetime and heat output Red-colored lamps to reduce visual light emission and glare Applications Providing relief from muscular pain and ailments such as rheumatism, lumbago, neuralgia and colds, etc. Promoting recovery from injury Providing comfort and cosmetic care