It does not change the light, but you can control is a bit by darkening the skin you want to load.
Or play with the skin darkness you load.

Preview in the faceroom is only 512x512, so you will NOT see the details.
And max texture for loading is 4096x4096 => (But will be previewed ad 512x512)

Make a copy of the head texure, resize to 512x512, and darken it a bit.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!