oh wow! the illuminator seems to have all the specs you'd want and benefits price-wise from not being marketed as a medical device, quite a bargain. The allergy reliever seems like it could work, although there is no indication of power rating (it says 7uC, the hell is that? not any power unit i've heard of unless i missed that day in class)

I grew up playing heavy metal but at one point caught the jazz bug, now I try to play everything but progressive rock/fusion is my jam- this is my current band:

Dodgy Boat (covered by Austin Loman Group) - YouTube

I think music is a full-body workout for the brain; at first I felt super discouraged when I would play; usually I like to stretch harmony when working on jazz standards and go for sophisticated substitutions, but the first couple months all of that felt super scrambled. Since though, it's been pretty therapeutic to rebuild that intuition, feels like it relies on a certain sort of problem-solving adjacent skill set, but in a more on-the-fly, gut-feeling sort of way compared with full on math-y analytical thinking