My photo today is hiding a secret message. I can't reveal is today, but maybe tomorrow.
Anyhow - it is the Danish business newspaper Børsen and an iPad with a dark screen. A Elinchrom D-Lite it 4 with a beauty dish (power 3) is the sole light source and you can see part of the beauty dish reflected in the ipad.
I used a grey card to set the correct white balance and a light meter to set the correct exposure (f/14 at 1/200 - ISO 200), but found that I could enhance the beauty dish reflection by stepping down by to stops to f/11.