LED Gas discharge or HID lamps are the energy-efficient alternatives to conventional gas discharge lamps. Gas discharge lamps have been phasing out since 2015, as they contain poisonous substances, such as mercury. Traditionally the lamps are used in industry, retail and applications with high pending fixtures. Besides saving energy, you are also assured of low replacement costs, because the lamps last for 20 years. Do you use open fixtures? Then choose the matte lamp finish. All LED gas discharge lamps have a 5-year warranty. So the payback of this fast and cost-effective solution is almost always within the warranty period.