Server Room Temperatures

I know we all know this, but you have to keep the server room temperatures down as low as you can.  Some people dont mind 80 and 90 degrees, from what I have personally heard from others.  However, I have been in electronics and I know for sure that electronic devices prefer cooler temperatures.  Just a fact of life and a longer lifespan for a piece of network equipment.  Keep the server room temperatures down low.  You will get longer life out of that equipment if you do.