[quesera]

Flicker is a side effect of a common method of variable LED dimming. It's not intrinsic to the technology. You can run an LED at a low level with zero flicker.

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.