almost finished my autoturning incubator, and now i'm now sure if i did something right. http://imgur.com/rSivgBB light bulb is a phillips 100w infrared. distance between it and eggs is 2 cm. it should be higher (how much) or is ok ? of course i will add a vent near to. incubator hold ~70 eggs. should i use a lower w eventually? this is the smallest infrared bulb i found. thanks !