I think these LED lightbulbs are getting slightly dimmer over time. I have a 4->1 "chandelier" in the living room and I had 3 LED lights in it and at some point it felt like the room was lit by candels.
I put 2 fluorescent bulbs in it and it's a night-and-day difference. Think I'm going to skip buying LED lightbulbs in the future, not worth the effort.
The only reason I use fluorescents rather than halogens is because 4x halogens get too hot for the light socket.