
Bought 2 of these for my 35 year old Mag-Lite, a 5C cell and a 3C cell. It worked in 5 but not in 3. I thought the old bulbs were the same but when I went to swap them out for these new LEDs I noticed that one of the old 5 had C cells stamped and the other one stamped 3 C -cells. So the old incandescent bulbs are different, and that difference extends to these improved LED bulbs as well. This new LED works great in 5. Unlike other reviews, it still has the ability to adjust focus from point to flood by turning the crown. And this LED light is definitely a big improvement over the old incandescent bulb. But I'm giving it one star because the list is misleading.

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