The Osram Haloline Energy Saver is a light source of the superclass. In a thousand burning hours you can have saved more than ten Euros at current (Osram HALOLINE R7S 300W halogen lamp brings 5300 lumens, so [5000/230] = 21.7 lumens per watt to [5300/300] = 17.7 lumens per watt, so about 19% energy savings). If the member holds 2000 hours - as promised - it has more than twenty Euronen well done. Recent cheap Halogenstab I threw after I had suspected for hours and examined the dimmer the light to be defective because only dim, yellow light was produced. Cheap can be quite expensive ...