I just have a small 9 led light with some foam taped around the end to cushion the egg from the metal and glass of the flashlight. It's bright enough to see into Welsummer eggs.
I just replace the foam after each batch eggs i candle, i have a 50' roll of it lol
Where are my electronics geeks? Anybody think I should take 5 SUPER bright 5W Luxeon LEDs , set them in an array in an enclosed holder and make the brightest cool light candler in the world!?!?!