G13 t8 master tl d xtra fluorescent bulb with extra long lifespan 55 000 hours philips clear reduction of the early failure rate through new x technology 3 band fluorescent bulb with ra 80advantages very long and reliable lifespan low overall operating costs through very high reliability and long lifespan lower disposal costs because it is 100 recyclable simple recognition through striking end cap form green x particularly environment friendly through low mercury content compl