This is going to get geeky. Most makeup artists undergo a heavy training under the harsh light of a beauty school or a basic ring light at home. It doesn't matter where you did your heavy lifting, you probably noticed that when your model steps out of the light - your work seems a lot different: contour may transfer as stain, eyeshadow too heavy and overall the model too old. If you think that it cannot be avoided - honey, somebody has been whispering lies: most editorial artists know how to produce light friendly looks with no fuss. Some, like Jordan Liberty, can even do a perfect look in 20 minutes.