Is there really a difference in candling with this https://www.gqfmfg.com/store/comersus_viewItem.asp?idProduct=283 then to a regular flashlight? Anyone have one of these and the comparison. Also, do you think just by this description I have good eggs to incubate or bad. I can see the air pocket in some of the eggs without candling if you look at it in the light the right way. Kind of like in the picture in the link. Does the size of the air pocket have anything to do with a good or bad egg?