⚠️Please read the profile before purchasing. Items are not sold separately. Only sold as a set, and one is brand new! Great deal! There are some writings here and there, but they are not visible when used for lighting, so there is no impact. I no longer remember the exact usage period. I think I've been using them for 3-4 years. Switching from regular light bulbs to LEDs will save a lot of electricity. How about it, people living alone? Topvalu: 1 IKEA: All the rest Approximately 4-6W each E26 x 6 E17 x 4