I love the light output of these bulbs. It's as warm and bright as previous 60W incandescent bulbs and for a fraction of the power. The A15 socket is particularly suitable for a kitchen fan lamp. I can't give the durability a high rating but I hope it's just a coincidence that one out of four has failed in just 4 months. I have ordered 2 more packs. to replace the failed one and noticed that the position of the LED segments has been changed. I hope for the best. They give off the exact same light as the previous ones so I'm happy with that. UPDATE: The second bulb from the original 4 bulb set failed after 5 months. I have replaced it with the newest of the two newest sets I just received. I'm keeping my fingers crossed that the new filament design will last longer than the old one.