Lumes an OTF ,what is the difference ?
- Thread starter bassdawg
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Shooter21
Enlightened
the 500 lumen rating is at the led so by the time the light exits the glass lens a lot of the output is lost. This is a clever trick most companies use to sell more flashlights they state the emitter lumens rather than the total out the front lumen output.
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phantom23
Flashlight Enthusiast
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- Nov 3, 2007
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500lm is maximum emitter brightness. But there's also series of losses before light will leave your flashlight. Good reflector can reflect about 80% of light. Yes, it wastes about 20% of light. Next - lens. Good lens waste another up to 5%.
