new here and a few questions

[steelersfan43]

If I were you, I would look for a LED flash light (on the package there will be a number that tells you the brightness, bigger number for brighter) If I were you I would mark the eggs you are going to let her try and incubate then take out the fresh eggs everyday so that she doesnt try to sit on those and then the incubating chicks die because she can't keep them all warm.
It might be better to take the ones that she is sitting on (that are clear when candled) and let her start over with fresh eggs since you'll have the best luck. Have you seen the thread that shows the stages of incubation (the pics from the guy that candles the eggs daily) here it is. https://www.backyardchickens.com/forum/viewtopic.php?id=261876 (You might have already seen this)

Good luck!!

 

[debilorrah]

Quite often when other hens lay in the nest, they push the first eggs out, because they want THEIR eggs to hatch. When my hen went broody I seperated her after a while to get that to stop. She managed to hatch 3 out of 9.