PAR is an acronym for parabolic aluminized reflector. A PAR lamp, which may utilize either an incandescent filament, a halogen filament tube or a HID arc tube, is a precision pressed-glass reflector lamp. PAR lamps rely on both the internal reflector and prisms in the lens for control of the light beam.
Causes of Red Spots on the Skin. 1  Acne (Pimples) Acne is a localized skin inflammation as a result of overactivity of oil glands at the base of hair follicles. 2  Allergy (Allergies) An allergy refers to a misguided reaction by our immune system in response to bodily contact with certain foreign substances.
Some of these are simply sun spots, but there are those that are small brown spots while others are brown scaly spots on legs and upper thighs. For these, the causes may be different and more complicated to be seen as simple sun spots or ageing spots. Here are the common causes of brown spots on thighs and legs. Aging and Dark Spots: As you grow older, the body produces much more melanin than when you are young. This is shown as a sign when your skin develops black or grey spots on the skin. The marks can be flat or small raised brown patches.