
(updated January 14, 2021) These lamps will continue to function for several hours even after almost daily use. I'm happy so far. If they continue to perform, my rating will increase to 5 stars. At the moment my rating has risen to a verbal 4.5 stars, which I cannot attribute to Revain. (Updated October 22, 2019) The company has contacted me to confirm that the dimmers are fully compatible with these bulbs. I forgot they were listed when I wrote my review and my lamp is not on the dimmer list. Its my fault. I have changed my rating to 4 stars. In the future I will raise or lower my rating depending on the length of life. I just received it today (October 15th). I put two (2) of these in my adjustable lamp. I wanted more light but they were only the equivalent of 40w not 60w when i bought them and i say they are pretty much comparable to a 40w incandescent bulb. Thus, the brightness rating is 5. Energy efficiency and durability are not known yet, as I just received them. However, my overall rating of 3 is due to the fact that these bulbs are specifically marked as "dimmable, flicker-free". Dimmable.yes. No Flicker.no. They flicker in my lamp until I get the setting down to about 65%. I'll try to make a video and upload it later. If they last long I would raise my overall rating to a 4. If I leave them I will update the shelf life information.

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