Osram Qti 1X28/54/35/49 GI 4008321383358 is the lowest cost solution for reliable operation of a hf-essential ii fluorescent lamp that is both economical and reliable. It is also an ideal entry level product for electromagnetic system users who want to take advantage of electronic ballasts. The cost-saving and reliable HF-Essential II is in the A2 energy efficiency class and its robust design meets all relevant international safety and performance standards. The HF-essential II is an ideal and economical choice for many uses such as general lighting, office lighting, parking lots, warehouses. .