TL5 fluorescent tubes are suitable for lighting offices, schools, supermarkets, and other similar environments. They are an excellent cost-saving option, particularly given their expected lifespan of up to 30,000 hours. TL5 tubes also feature an eco-friendly coating on the inside of the glass, effectively preventing the phosphors from absorbing mercury. Longer TL5 tubes were introduced across Europe during the 1990s. The design of these elongated tubes has been based on multiples of the 300mm (11.8 inches) ‘metric foot’, rather than the 305mm (12 inches) imperial foot. The ballasting of these fluorescent tubes prevents overloading and allows for the integration of features such as the instant, rapid, and programmed start.