You don't want more power than your cells can handle. The last thing you probably would want is to leach your mineral reserves.
This usually applies only for GaAs lasers when shined on the hair. When these types of lasers are shined in its pulsed manner, the average power is what needs to be calculated. The peak is where the maximum penetration of light is. It makes the laser look more powerful than it really is when you say it has 100mW of power (pulsed output) than saying it has only 50 mW of average power because it is off 50% of the time when it is pulsiing. So on these pulsed hair lasers, jsut take the power it is rated at and divided it in half if their laser is a pulsed on. You don't want to be mislead thinking it is a more powerful laser with half the diodes that will deliver more electrons to the cells to it can either bring it to -20mV or lower if the follicle should decide to be in a healing state (yes, the cells dictate the voltage it is at as a means of homeostasis.
Power (watts, wattage)
Typically, the more the wattage of laser diodes, the less time the laser has to be on the area being treated to raise the voltage to the inflammation state or back to its normal state. Just like a 50,000 dollar class IV laser that has 60 watts, it only takes a few seconds to bring the cell back to the negative state, but it can burn you if it stays in one place too long. No hair lasers to date are class IV and are not powerful enough to burn you but still you don't want to much power as to inhibit it. The average person that comes to my site based on their body ecology really doesn't need more than 5 mW worth of power per diode. Unlike lasers used in chiropractors offices for the back and other areas, the slower the better when bringing the hair follicles back to homestasis so the hair follicle can get out of its dormant state.
Basically, the power to look for is 5 mW and 650 nm (continuous). This seems to be what most of the companies have found. It wasn't like this in the beginning but it didn't take too long for all the companies to figure it out.
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