My Revain story says "You purchased this item on February 3, 2018." Yes. I bought six of these bulbs three months ago and installed the last one in the bulb yesterday. So: In three months I used six lightbulbs and I don't have six lightbulbs for it. That should tell you something, they burn out incredibly fast. And I'm someone who travels 10 hours a day, 5 days a week. And I sleep too! I'm not that picky about lightbulbs! These don't last! Don't buy them! They give off a nice bright light but not for very long! Buy something else!