I bought on the reviews here this LED. As with Amazon, it was very quick and the lamps were delivered. The curiosity won and I made immediate replacement. I was extremely impressed with the result. The room was brighter than my 40 watt bulbs and the light was not too cold. Then we went into the hallway. There I have 5 x 40 watt lamps and had to change the light bulb again. This is troublesome because the lamp is difficult to access. Now I hope for a long life and have once again ordered me replenishment. Save power and good light warm light - SO MUST BE! All experiments with fluorescent bulbs were unsuccessful. Unfortunately, the LEDs can not dim properly .... but you can not have everything. In any case, this product gets my buy recommendation.