Burning Hours - Polycarbonate with standard MH 400W/PS @90C ----- Polycarbonate withUV Shield™ @100C	150 Watt Metal Halide Non-Visible UV Spectrum (in nanometers)

Uni-Form^® pulse start systems now include UV Shield lamps in a range of wattages, from 50 to 450 watts in open fixture design. UV Shield lamps feature the Uni-Form^® formed body arc tube with a specially-treated quartz shroud that reduces ultraviolet light output by 80%. UV light emissions cause fading and damage to plastics and fabrics. UV Shield lamps virtually eliminate yellowing of polycarbonate fixture lenses to ensure extended maximum light output while providing superior white light.

Laboratory tests demonstrate that UV Shield extends the life of a polycarbonate fixture lens six to ten times longer than using a standard metal halide lamp. In comparison, accelerated laboratory tests show that at just 1200 burning hours, the UV output of a standard metal halide lamps degrades a polycarbonate lens to a yellowing index (YI) of 25-40, well above the level considered failed. The lens material is so yellowed that light transmission is virtually impossible, and the impact resistance of the plastic is compromised. The same laboratory tests reveal that lenses the UV Shield protection show a YI only 2-5 over the same time frame. All UV Shield lamps feature Uni-Form^® pulse start technology and provide the same compact size, long performance life, and energy efficiency along with UV protection. UV Shield is ideal for preventing yellowing and fading in a wide variety of interior and exterior applications in manufacturing, warehouse and retail establishments.