Maximize energy savings without sacrificing light output Outstanding energy savings - save 5 watts when switching from a standard T5 HO 54W lamp, with no sacrifice to performance.;Sustainable Lighting Solution - only 1.4 mg of mercury per lamp - the lowest mercury levels in the industry.;With just 12 Picograms per lumen hour?, these lamps allow for more design freedom and help exceed all LEED requirements (For more information on LEED, please visit www.usgbc.org) Philips Energy Advantage T5 HO 49W lamps are environmentally-responsible, ultra-slim and have extraordinary light output with increased energy savings. Reduced maintenance and disposal costs.;Long life (40,000 hrs RAL**) for an extended relamping cycle.;Outstanding energy savings - save 5 watts when switching from a standard T5 HO 54W lamp, with no sacrifice to performance.;Save $20.00 instantly in energy costs over the rated average life of the lamp;Operates on any Programmed Start ballast.;Sustainable lighting solution- Reduces the impact on the environment: low mercury, energy efficiency, long life, and less material.;Only 1.4 mg of mercury, the lowest in the industry.;With just 9.8 Picograms per lumen hour?, these lamps allow for more design freedom and help exceed all LEED requirements.;Extreme Temperature lamp provides extraordinary output even in spaces without climate control. Lumen output is <gt/>90% from 65 degrees F to 170 degrees F due to amalgam technology.;Available in 49 Watt - 3000K, 3500K, 4100K and 5000K Color Temperatures. Ideal for medium-bay and high-bay retail and industrial applications.