Greetings Macrumors, Recently in class ive noticed some students computer screens have different colors in temperature. Their screens change as the day progresses. This is a program called F.Lux. Can someone that is using this application tell me if its worth the cost? Ive read that it has to do with eyes and the strain that screens give. Im using a macbook 3,1 with snow leopard and want to know if this will benefit me?