The jury really is still out on the led masks whether they work or if it's snake oil.
I just think of doctor doom when I see people.using them.
Red light is the most studied and has been found to be very effective in treating pigmentation and redness whilst improving elasticity, texture, healing. Depends on the wavelength of the device you buy. Some are useless but with the right wavelength clinical trials and studies have shown good results in the at home device market.
Personally I have seen incredible results with mine. Very multi purpose too. I used my device on a non facial bruise and it was reduced after a day, gone within two. I usually bruise for over a week.
Perhaps going to bed with a greasy mop on the same pillow all week also isn’t helping your skin Zoe. Nor is using molly’s skincare cast offs without checking if they have any beneficial ingredients for you. I despair.