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Replacement Bulb for Ultrafire WF-500 Flashlight
(cdn.tcb13.com)
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Thank you for the reply.
So your in your opinion something like this would work better: https://www.aliexpress.com/item/1005005278498808.html
But... I don't believe that bulb does 500lm was advertised.
Not really. With that bulb, all the light is focused forward, not to the side. The light will never hit the reflector, it is only focused by the lens in the LED housing, and that isn't enough.