Lights and Blending

I was wondering, do the real game dev’s use the Lights of opengl? (only 8)
if not, what do they use and were can i find info about.

How do they make transperecys? blending? isnt it way to slow?

thx

www.opengl.org http://nehe.gamedev.net www.gametutorials.com

It should help.

yaro