Why do these LED light bulbs flicker when my remote control has turned them off?
The remote you use to turn the light on and off is not compatible with LED bulbs.  One reason people love LED bulbs is because they use so little power.  Unfortunately, some devices in the past used the fact that a regular light bulb can pass some current without glowing.  Certain types of switches use a little bit of "parasitic" voltage running through the bulb to supply power for them to operate.

Now, some LED bulbs will flicker even if they have a very tiny current.  The two solutions that I see are to try a dimmable LED bulb, and if that doesn't work, remove or replace the remote module.  Even if you don't have a dimmer function, the dimmable bulbs have more electronics in their drivers that could prevent them from flickering when a small current runs through them.