My opinion is that it runs rings around the yellow one that we did use on checking the eggs during hatching eggs at home, very bright light for sure, lights up the inside of the egg much more than our other one , the off/on switch feels good to use, clickty click .
It is easy to twist around while holding the egg on the end to check in the egg for movement etc.
Had a look at/in a dark shelled egg ....... not a problem there either.
Hey ...... while you are here, l have one of those yellow egg candlers that is now defunct, would you like to buy it ??? No ....... ? oh well, it might do as a paper weight on the desk.
Pete