I have dancing babies. 27 eggs set. Had a hard time with temp regulation for the first few days. Then, seemed to get a handle on it by turning the fan off, and repositioning the eggs to get them into the right "zone". Occasional temp spikes. So, currently, I have 18 dancers. I need to remember to use a table lamp for candling. I took the "bail" off it, cut the bottom off a shampoo bottle, wrapped the bottle in a sales flier to make it the right length, wrapped tin foil around the top part of the bottle, and slid the bottle down over the bulb and stem of the lamp. Using 7 W CFL. It gives a view of even the most reluctant eggs. For some odd reason, most of the brown eggs are not fertile. but, I think all of Nellie's eggs have dancing babies. (Jack must really like her!) And it looks like most of the green/olive eggs have dancers, though it is harder to tell with them.