I live in Canada, my eczema was always in the winter and didn’t manifest when I go traveling south. I tried many things, but the medication is cortisone (can really help if you have a bad flare up) but thing spring back with a vengeance. You are playing the junky with your immune system, what I feel we do with most medication.

For long time I thought it was UV, vit-D, humidity, but I stumble upon this thing about infrared while watching Medcram to learn about Covid (awesome channel by a doctor)

Anyway, the heat dish was a cheap test, locally available.

I figured the spectrum will be continuous in opposition to specialized led, closer to what come from the sun anyway. To my surprise it worked.

Maybe the specialized lights are better/stronger/faster.

My highest confidence is in the sun.