It's overloaded.  I see whitescreen all the time.  You probably have to many lights.  Three is almost as much as my machine can handle.  28?!?!  Wow.....you could fry eggs on your CPU with that!

You need as FEW lights as you can possibly get by with, otherwise render times skyrocket.

On one topic mentioned in this thread, I have a dumb question--How do you hide figures for renders?  I usually just delete them once the file loads (which is time intensive), render the part I need, reload and delete the other figures.  Is there a quicker method?

I cannot save the world. Only my little piece of it. If we all act together, we can save the world.--Nelson Mandela
An  inconsistent hobgoblin is the fool of little minds
Taking "Just do it" to a whole new level!