The invention provides a kind of power saving fluorescent lamp which can have a long service life and high optical efficiency. The lamp can show the color index number to be up to 98 and have the whole spectrum. The invention adopts an electronic ballast to drive the strip lamp, wherein the strip lamp is a glass tube which contains less sodium no lead and has luminescent materials just like metal oxide, phosphate and borate in the internal surface of the pipe. The next part will show the characteristics of the luminescent materials. The luminescent materials also contain tin and compounds with tin. The weight percent of every element which mikes up the luminescent materials is: Sr 8.2%-10.3%, Mg 1.5%-3.6%, P 3.2%-5.8%, O 25%-35%, B 0.01%-0.1%, Eu 1.5%-3.7%, Y 20.5%-25.1%, Ce 2.1%-2.7%, Tb 1.1%-3.2%, Al 20.1%-28.4%, Ba 1.6%-4.2%, Mn 0.01%-0.06% and Sn 0.005%-0.02%. The kind of lamp can transmit a visible spectrum that is continuous and has uniform energy. This kind of lamp can show the color index number to be up to 98 and has almost nature spectrum. The invention can be used in some special locations which is like illumination, printing and dyeing, spinning, jewelry, making up and so on. The invention can protect eyesight, avoid tiredness and improve the efficiency of working and learning. The excellences of it help it achieve the request of high quality lamp-house.