i use a small flash light ,a bright one and put the egg over it holding my hand to where the light only shines on the egg, kind of hard to explain, but its pretty easy once you try it, i just recently made a candler that works very well out of an old foldiers coffee can, i just took the metal can and put a light bulb fixture in it, and cut another one to slide on the top of it and cut a small hole where the egg sits on it and you can see it perfectly, theres many ways, but the easiest would have to be just the ole flashlight! hope this helps, good luck,