Hi, I am a newby. getting chicks tomorrow, have built the brooder. My question is what wattage of light bulb do I use and what color. I have read posts of red bulbs being used, what is the difference? I plan to buy the fixture at the feed store where I am getting my chicks. Thanks in advance for your help. I am sure this board will be my new favorite place to be as I will have lots of questions in the next few weeks, i am sure!