It may be the quality of the Chinese LEDs that causes the proble. We have a two lamp, reading lamp, meant for 60W E27 incandescent lamps. Because of the heat, I removed the shades and milled two 1/4" wide slots to improve ventilation.
Cheapie Chinese LEDS did not last more than a year in the fittings, (On for about 5 hours per evening) before they developed what looked like a 50 Hz flicker.. Lamps from better sources have lasted longer, so I got what I paid for!
Howard