A LUMILUX® T5 HE High Efficiency Fluorescent Tube, dimmable, without cardboard sleeve. It is suitable for public building, office, shop, supermarket and department store, industry, outdoor application only in suitable luminaire. Good economy and efficiency, up to 20 % more economical than LUMILUX T8, up to 50 % smaller volume than comparable T8 lamp. Tri-phosphor fluorescent tube only 16 mm diameter. Environmentally friendly fluorescent lamp with a low mercury content.