Finding it difficult to see anything in the Marans eggs I was incubating I made this. It's simple, 760 Lumens LED with the plastic bulb removed, a cord, cardboard from a tp roll, aluminum foil, tape. It's so bright I worried that I'd blind them in egg. It didn't.
Do as Kiki suggested and "shine the light in the fat end of the egg".
Do as Kiki suggested and "shine the light in the fat end of the egg".