I bought a few years ago energy saving lamps (8W) for expensive money, which slowly "anglühten" until you have a few minutes reached the full Helligkleit. After 6 years, regular operation in the office, this 50% of its luminosity lost. So it had to "New" ago. Then I have this E14 lamps, LED spotlight found pardon. I have a 4 x 40W ceiling spotlights, E14 mounted in my office. as I sit all day in the office and is the window on the west side, I need in the morning a sufficiently good lighting. It is actually "warm white" ... Thought ordered, arrived on time and (easily) purely screwed. After I'm a little skeptical about LED lighting, I write the review until six months later, because I know that this may subside relatively quickly in luminosity. For me, this LED spotlight is about 3-8 hours, depending on weather in operation. Measured subjectively, this approximately 10% -15% are darker than 6 months ago. But still much better than my 8W power saving bulbs. Certainly, the LED spotlight can be further easing over time. But so far no LEDs are still down. We assume a MTBF of 50000Stunden out, that would be very good!
