The fluorescent lamp is made with an aluminum-free borosilicate glass having a composition, in percent by weight, based on oxide content of: SiO.sub.2, 65-77; B.sub.2O.sub.3, 7-20; Li.sub.2O, 0-2; Na.sub.2O, 0-4; K.sub.2O, 3-12; MgO, 0-2; CaO, 0-2; with MgO+CaO, 0-3; BaO, 0-3; ZnO, 0-2; ZrO.sub.2, 0.8-12; TiO.sub.2, 0-10; CeO.sub.2, 0-1; and F.sup.-, 0-0.6. Preferred embodiments with more than 1% by weight TiO.sub.2 have especially good UV blocking properties and are especially suitable for lamp glass for backlights. Other embodiments have good sealing properties to tungsten, KOVAR.RTM., and molybdenum and have coefficients of thermal expansion .alpha. of 4.7 to 5.3.times.10.sup.-6/K, good chemical resistance, and a working point V.sub.A of between 990.degree. C. and 1290.degree. C.