Comment by buildbot

If you are sensitive you can get really, really annoying blips of flicker even above 1khz - https://journals.sagepub.com/doi/10.1177/1477153512436367

They also flicker really badly if your power is not perfect, like you have a decent sized training rig on a different circut.

Incandescents are basically little light inductors and I would imagine the luminosity curve would be sinusoidal vs whatever hell a LED driver chip puts out.