T5 lamps have a small diameter and are designed to be used in very small luminaires. The temperature that develops inside the fixtures is generally well above 30° and it is precisely at these temperatures that the T5 DFH offer the best performance in terms of luminous flux. In these optimal conditions, the T5 can obtain a luminous efficiency of up to 20% more than a T8 triphosphoride tube of the same power, obtaining Energy Class A. These tubes are used exclusively with an electronic ballast and can be used with a dimmer. light. The light shade makes them ideal for offices, banks, schools and shops in general.