I've tried with the two flashlights that we have and a 60 W bulb through a hole in a box and using a toilet paper roll. I can see an air sac but I can't see anything in my eggs other than to tell that it's dark. They're on day 13/14 of incubation, so I know I should be able to see something. I can't build a real candler with wood, but what other things can I try? I know I need to buy a bigger flashlight, though those of you with kids will understand the short lifespan flashlights have in our house. Thanks for the suggestions!