After adding color to the plain black background by introducing the Christmas lights, I thought adding multiple images of my subject would make it even more interesting.
This is where I have to stress I had intentionally asked my students not come dressed in light shades especially not white.
For reasons far too scientific for us to ponder here, suffice to say, white reflects too much light in contrasty situations, so it’s best for your subjects to avoid wearing that color.
Also, since repeated flashes tend to build up cumulatively, over time there will be loss of detail in light colored clothing.
Movement is key
Improving on what we already have, I thought repeated pops of the flash would give me multiple images of my subject and make things more interesting.
I suggested that the subject move so they don’t occupy the same space in the viewfinder.
That way, they don’t get over-exposed through repeated exposure to the flash.