@DominicY sounds like a bad bulb.
LED’s are more or less long term investments. If you don’t see yourself living in the same place (or using the same lamp) in the next 5–10 years, possibly not worth it. Planning to settle down for a longer stretch? Totally worth it. Brightness is more than satisfactory (for my tastes, i don’t know about you, perhaps you prefer something akin to flash bulbs), and they are supposed to last a REALLY long time while saving you energy and thus less money spent on the electricity bill which the savings will cancel out the price of said bulb.
Then again, if you don’t see yourself staying in the same place in the next 5–10 years, you could still buy the bulbs and then when moving out, dick over the new home owners by taking those bulbs with you and leaving them with the crummy incandescents that were originally in those sockets.