I have a small incubator I made 8-9'' with a 15w bulb, today is day 18, but I am calling it day 17 because I put in eggs late in the day 18 days ago. I candled my eggs, 3 looked normal 3 were alive but being larger eggs they had more fluid in them then I would like, so I built another incubator, exactly the same, and am going to separate the hatches so the eggs with fluid say dryer, and I will lock down the others tomorrow.