More impressive than the color change is the increase in hair density!
i think i noticed and is also written other places that if do rapamycin topically ofcourse with the other agents to make a topicaly solution say at 1/2 or 1 percent rapa where u want it will help keep ones natural pigment such as when they were younger.
I bought this brand to make an 8-light source from a bathroom light fixture also bought on Amazon. I have since mounted it horizontally because I got tired of standing in one place for twenty minutes. The power density of the lamps is 140 mW/cm² @ 6inch, which is in the range of many studies.