F Class, this is for those who are looking for something more. Thin plastic, very lightweight, made in China, good light, question mark for durability over time. If you want something more quality and a little more expensive, then Philips (some stores offer them with a 2-year warranty).

We have been using these bulbs for a while now. They have a long lifespan and provide a very nice lighting color. Neither the pure white nor the yellow is what we need

Strong light, nice white color (neither yellow nor blue). It is not 9W but 8.5W (not that it makes a difference)