Some indicators seem to come ON and OFF. Why aren’t they consistently ON when the mat is plugged in?

Each time you press the button, it activates a function (Photon, PEMF) for a specific amount of time. The indicator lights up when the function is activated and goes off when the time has elapsed.

The heat indicator goes ON and OFF because the mat is not heating consistently. The electric heating system works only during 10-20% of mat session time as it stops when the mat reaches set temperature and resumes only after the temperature drops.