Right before I want to go to sleep, I darken the whole house, light one or two candles, and read a slow-paced book. 15 minutes to drowsiness, 5 minutes to sleep, every time. I'll even look at a blue-light screen right up until candle-time.
Burned her house down, killed her pets (fish), and barely survived herself.
She now recommends not leaving candles burning unattended.
There might be a battery-powered candle-like LED thing that gets the same results.
There are a lot of anecdotal stories out there where people get a reduced sleep quality after switching to LED lighting in the bedroom. Is there something deeper to the story? Quite likely. The question now would be whether this affects everyone or if those people are outliers.
But I'm thinking of the tea light replacements that are sold for use in jack-o-lanterns. They intentionally "flicker" in a candle-like way, instead of the kind of flicker you describe.
LED devices can also produce a wide range of color temperatures (esp when filtered and diffused), so there's no inherent blue light problem.