Energy Saving: IceCap`s HID Electronic Ballast is the most efficient 150W available. It provides superior energy savings through an active "Power Factor Correction" input stage, ensuring a P.F. of over 94% for any line/load condition. Benefits: - Minimal waste heat generation. - Allows more ballasts to operate on the same circuit. - Minimum load on air conditioners and/or chillers. - Superior Ignition Unlike competitor`s ballasts, which employ "hard" pulse ignition, IceCap`s ballast employs patented "soft" highfrequency ignitions, virtually elimination the bulb`s electrode wear (which is the major factor causing lamp aging and failure). Benefits: - Reduced "lumen degradation" resulting in almost constant light output over the bulb`s useful life. - Increased bulb life. Reliability IceCap`s unique electronic ballasts are designed and built for maximum reliability, and years of troublefree operation. Benefits More than 100,000 hours average ballast life at 122 degrees F (50 degrees C) ambient operating environment (lower temperatures = longer life). Warranty Like all IceCap electronic ballasts, a no hassle, transferable 3year warranty. Great products built to last.