I have some Feit brand filament style LED bulbs used in my ceiling fan light-they work well.A Sylvania 100W Eq LED bulb is flicking now-used in my bathroom light-this thing uses 4 100W bulbs.Yes,like any other electric lighting-LED output fades with age.The other failure prone component in both LED and CFL bulbs are the electrolytic caps used in their power supply boards.If the bulb can be left on-you will get the longest life-electrolytic caps don't like being turned off and on.That shortens their life.