Not enough illumination in my opinion. Even though Im using 12 of them for my big  chandelier in a small office, the room still a little dark for my taste and my needs. I study and do crafts in this room and the yellow glow is just making me sleepy and unable to focus. But thats not why I knocked out two stars. The glass on the bulbs is turning brownish in color after a week of barely using them! It looks dirty or burnt. For the price, I expected a better quality. My chandelier does look gorgeous, though. Getting lots of compliments on it. But as for the bulbs, not a fan.