We had in the stairwell energy saving lamps, which should replace our previous 60Watt light bulbs. There were ghastly Funzeln that only when I had already entered the apartment, reasonably bright burned. Now I have used these lamps. The Hammer! Felt 100 watts compared to the energy-saving lamps and as I remember also quite lighter than the previous 60 Watt bulbs. Without time delay immediately light. I'm excited.