Bulborama offers a diverse range of Enviro-Lume certified Supra Life energy-efficient linear fluorescent bulbs. Unique Krypton/Argon gas mixtures reduce energy consumption and result in 80 % less Mercury to protect the environment. Heavy duty triple-wound cathode guards provide burning life of up to five years and 44,000 hours. Extended life phosphors reduce color shifting, provide consistent lumen output levels, and allow Supra Life fluorescent bulbs to outlast standard lamps up to 5 times!