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How many mW is needed to light the blade? These pictures will help give you an idea.
My blade is bent and the light is not going all the way to the tip. What should I do? Counter bend it to make it straight again. You can actually straighten the internal white diffuser tube this way as well. You can safely bend the blade as shown in the photo below. If you bend more then this the blade may fold.
Why does the light not move up and down the blade? The magnet is at the tip of the blade. Forcefully bring the hilt down into the palm of your hand to free the slider.