I have a heat lamp with a 250wt bulb that we use at night due to how cold it is at the moment. It was a white bulb. I wanted to get an extra one and the local feed store only had ones that gave off a red light. Is there a difference on how laying chickens with react to it. Some one told me that the red bulb can slow if not stop them from laying and I dont want to do that. Any thoughts?