I have tested several LED spots before I decided in large quantities for the Evolution Pro Line. I have it installed in eleven different rooms, bathrooms and hallways. There, they are among the conventional dimmers for the normal 35-watt spots "responsible" were previously in operation, because right now it's just too expensive to replace in addition all 16 dimmer (some way switch). So an LED was needed that works fairly reasonable with the conventional dimmers. The LEDs of Evolution Pro Line can be up to about 25 - turn down 30% of full brightness; a satisfactory result for me. In addition, none to very low noise caused when dimmer itself and perform even in continuous operation without the overheating of the dimmer (as part of other LEDs found). Even an annoying flicker (as partly. In other, sometimes expensive LEDs observed) did not occur, or only minimal, barely visible, on. The other tested by me sometimes strong flicker other LED spotlights can incidentally the fire alarm (ceiling-mounted) trigger. The light quality is outstandingly good, stepless luminosity unfolding without "performance leaps" with my conventional dimmers, at full load very high luminosity, very good dispersion, no unpleasant glare. Only the time of 1-2 seconds until the LEDs need to actuate the light switch to emit light, is initially annoying, but habituation thing. I assume that these LEDs function even better with a special LED dimmer. In fact, the lights are slightly larger, but still fit well into the sockets (I have two different versions in the installed floors). Since I have now annhähern 100 LED spots fitted or exchanged for the previous 35-watt spots, the power consumption of our company is now expected to radically move down. Given the overall very good value for money I give a clear price recommendation and despite the 1-2 second start time delay 5 Stars.