Hi everyone, Has anyone used this similar LED downlights before? It is recommended by my contractor and it is made from China. I ask about the brightness and the "lum" and it was not specified. I am very confused if 9w is sufficient or 12W. My contractor suggested 12w at a spacing of 1.5m apart. However, I find for 12W, the size of the downlight is almost 15cm wide which looks huge on my small ceiling. Any kind soul who has tried installing similar LED downlights from China, can share with me on the brightness and also the spacing between the lights? Thanks!