Ok I couldn't wait till day 10 to candle again so as I was turning them I quick candled my 42 assorted eggs. At least 6 of them have definate development going on - but it looks like 4 of those have floating air cells. A lot of the eggs are a dark brown - so its hard to tell what is going on in there. But YAY for 6!
Good luck, I got a flashlight from Wal-Mart, Rayovac 81 lumins (spelling) and you can see with the bown eggs. It works good. But it did cost $24.99.
I am using an LED light - I guess I should rephrase that as all I can see is a dark blob Except what I think are the Maran or Pendesca eggs - My neighbors son has a $150 scuba diving flashlight that would really light things up - might ask him if I could borrow it sometime next week.
I took mine in a really dark room, no windows, no light. I could see the Marans development with a homemade 40 watt candler, but they weren't the darkest eggs.
I took them in my closet As of now all I can see is the dark blob of the yolk. This happened with my first batch and I thought they weren't developing but I left them in the bator. Lo and behold most of the ones I questioned did develop chicks. I'll just wait them out some more unless I see bad signs.
I've had some difficulty seeing into my Marans and Ameraucana eggs. Today one of my "dark blob" eggs is hatching. I guess there hope yet!
My DH has this headlight flashlight that he uses when he backpacks. It has a white light and a red light. I was messing around trying to candle my eggs and on the darker eggs I could see better with the red light. Couldn't see everything but I could see more. JC
Hooray! It's always a relief to know that something is growing in those eggs while you are trying to patiently wait. Sam's sells a double pack of flashlights with 150 lumens for $28 and that's what I bought to candle with. That was the best $28 that I ever spent!