Tanning Bed Sunlight Equivalent What Is The Equivalent Of Tanning Bed Minutes To Time Spent In The Real Sunlight?

What is the equivalent of tanning bed minutes to time spent in the real sunlight? - tanning bed sunlight equivalent

I tan in a bed Sunvision 28LE Wolff if it makes a difference. Max is 20 minutes. I ask myself that every minute in a solarium, which corresponds to the sun in real time. The owner of the gym, where I tan do not know.