I was working in my shop the other day and noticed it was not as bright as it used to be. Of course there were some bulbs out. So I decided to install some new ones. This is where it gets interesting. I have the 2 bulb 4 ft fluorescent fixtures fastened end to end on the trusses. Over the years I have been converting some of them to l e D’S when the ballast’s fail. I have some old fluorescent bulbs with the silver ends and some newer ones with the green ends. Ok in 2014 I started putting dates on them when I change them. Well yesterday there was a silver tipped one dated 10-11-14 right next to a green tipped one that was dated 1-7-22. Both bulbs were out. I installed 2 new bulbs and it was fine. I found similar dates on others. Here is my thoughts. The green ones are supposed to be better on the environment. But the silver tipped one last 7 - 8 YEARS longer. How can that be better for the environment. And yes all of the lights are on one switch. Let the discussion begin. Thanks guys