It's a light test

We have been giving studio lighting courses with my great fellow Koshkin already for five years. When we teach light metering then one of us sits on a stool to be a dummy and the other one shows metering. This time it was Koshkin who sits and I was playing with meter. To proves the numbers are right I took a test shot. Usually after our workshop I delete these photos, but this time there were some previous works on memory card and I couldn't format it. Some days later after downloading stuff from memory card I found these three test shots of Koshkin, just one single image of each lighting scheme. And here it is - one click test shot which is better than 500 photos from two hour session.

Light test - Koshkin