The perfect replacement lamp for customers looking for a simple solution to change either T8 lamps used in electronic ballasts or T12 lamps used in magnetic ballasts. Proven over 40% energy savings compared to traditional fluorescent lighting;Lifetime delivered: Average life rating of 36,000 hours;Minimal color shift and stable flux output throughout lifetime The Philips UniversalFit (UL Type-A) T8 lamps are designed to operate on both electronic T8 ballasts as well as magnetic T12 ballasts. The UniversalFit is a simple plug and play installation with no need to change the ballast. Compared to the less efficient T12 lamps, the UniversalFit lamps can save up to 50% in energy costs while providing longer life (36,000 hours). These lamps also meet the Philips standards for light quality so that end users will be in comfortable environments while benefiting from lower energy usage. One lamp to replace both T8 and T12 lamps;UniversalFit LED tubes exceed UL pin leakage requirements;Available in 4 T8 glass option in either 4000K or 5000K color temperature Warehouses;Offices;Schools