Single-piece compression molded fiberglass reinforced polyester composite. Silicone o-ring provides a watertight seal. Antique Brass, Brass or Composite Black Cover. Shock and heat-resistant clear, tempered glass lens. MR16 – 50W maximum. ProLED® MR16 lamps offer 40,000 hour rated life, 10-15V input voltage range, multiple beam spreads and 2700K, 3000K and colors (amber, blue, green, red and color changing options).