Yes, those eggs were most likely infertile. They look about as clear as any egg you take from the fridge would look, but from the darkness of the yolk it is possible that there was some cell division but it quit early on, before an embryo was formed. However depending on your flashlight, sometimes the yolk is naturally darker. Depends upon whether you saw the eggs grow darker or whether they were always like that. By day 8 you would have been seeing a lot of clear veining, with a flashlight as powerful as yours, no doubt about it. Doesn't matter how you position the flashlight.
Just found this, take a look, it might help you next time:
http://chat.allotment.org.uk/index.php?topic=73884.0