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The beam pattern is rather tight, with a hot spot that gradually falls off from the center, giving you a good compromise between a tight beam for searching at a distance versus a wide beam for good peripheral vision
This is for about half a second, but I asked me if there isnt another solution here
The method is called pwm ( P uls W idth M odulation), it is very easy to implement, but it can have some side effect, when looking at moving/rotating objects (Especially for low pwm frequencies)
Its rechargeable design helps reduce the need for disposable batteries while delivering reliable performance
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