Here’s why low-power devices and small devices are a problem (even if you were to increase the length of time you use it): Penetration Depth: Let’s take two lights of equal size, but one light is 50W and the other is 100W. Theoretically, you could use the 50W light for twice as long (let’s say 10 minutes instead of 5 minutes) and reach the same dose. And on paper, based on the simple math, this is indeed the case. But here’s the problem: More powerful lights penetrate more deeply into the body. They deliver more overall light deeper into the body. So if you’re trying to reach deep tissues, you
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