Long life, extra low mercury Sustainable lighting solution - only 1.7mg of mercury per lamp with ALTO II Technology;Reduced impact on the environment without sacrificing performance Philips PLUS T8 lamps are energy-efficient lighting solutions and offer long life. 95% lumen maintenance and reduced lamp-end blackening;Available in multiple wattages: 17W, 25W, and 32W;Available in multiple color temperatures: 3000K, 3500K, 4100K, 5000K, and 6500K (except 32 watt) Ideal for applications where longer relamp cycles would be beneficial