I have replaced at a ceiling light 2 of 4 energy-saving lamps with these LED lamps. The energy-saving bulbs I had bought along with the ceiling light and did not want to completely discard it. But it obviously annoys the long period of time until the energy saving lamps have full light output. Now there are two lamps, namely the LED lamps, immediately there and the energy-saving lamps run slowly up to full light output. I think it's great that one is not even in the dim light, but that it is now really bright.
The color fits and through the frosted glass a very nice diffused light is generated.
For durability (20 years old are promised at 2.7 hours per day), I can say nothing, however. On the packaging or "four years Osram guarantee" is = Lamp Replacement for product defects at non-commercial use.
