Philips T8 High CRI lamps featuring ALTO II technology are ideal when better color rendering properties are preferred. Outstanding lamp performance: • 95% lumen maintenance and reduced lamp-end blackening• 90 color rendering index• Limited warranty period based on usage+Better for the environment:• ALTO II Technology is TCLP compliant*• Only 1.7mg of mercury with ALTO II technology• Reduced impact on the environment withoutsacrificing performance• ALTO II means 50% less mercury than the original ALTO T8 lamps