All of the above,
GammeCorrection on, render in BB envysfere, and reduce light in tensity.
hey, I rarely f ever, use more then one infinite light anymore.

If you realy need very sharp renders?
Render big size, and reduce and sharpen in a photo manipulation prog.

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"!