The Osram HQL LED PRO is specially made to replace 125 watt gas discharge lamps which use high amounts of power and energy, and contain mercury. This LED alternative saves up to 75% in energy costs and doesn’t contain mercury or any other toxic materials. With a lifespan of 50,000 hours, it will last approximately 15 years in an average business environment and that means lower maintenance costs too. It even comes with a warranty for extra peace of mind. Gas discharge lamps are traditionally used for industrial and street lighting. Installing the LED lamp is very easy: Switch the power off – Open the fixture – Remove the old gas discharge lamp – Insert the new LED lamp – Close the fixture again – Switch the power back on and start saving 75% in energy costs!