Alas, I didn't measure it with a meter (since I don't have any), but according to the spec it draws 14W with a panel size of ~70 square centimeters. There's dif

Alas, I didn't measure it with a meter (since I don't have any), but according to the spec it draws 14W with a panel size of ~70 square centimeters. There's diffraction and everything, but since I put it directly on the skin, it's fair to assume that the theoretical absorption is 200mW/centimeter. BUT, power loss is huge (cheap infrared LEDs are below 50% efficiency), I don't think that, all in all, more than 30% of the input energy are preserved. So that would be 60mW/centimeter.