The lights all work very well (20), can also be super dim (without flicker, etc.), but man must pay attention to the diameter, because more than half had a diameter about 5cm. I then had problems with my mounting frame, because I had to press the lights in and then came out very. Luckily I only needed 7 pieces for the mounting frame and have exactly 7 lights found the why and the deduction of points.
Otherwise, I can only recommend these lamps and they also would buy again.