Hm. I went to the store and compared CFLs and LEDs for the same lumen rating. Their electrical power was about the same. Flicker - I actually have an Ikea LED

Hm. I went to the store and compared CFLs and LEDs for the same lumen rating. Their electrical power was about the same. Flicker - I actually have an Ikea LED lamp that has two active elements inside (2 LEDs). The supply is a simple 12 V AC transformer. I suspect the two elements are connected in a push-pull (anti-parallel) circuit, because they've started to flicker recently - if mounted push-pull and not equal in terms of brightness, that would explain it. I thought CFLs produce more of a weird green hue - at least that's how both my eye and my cameras see it. At any rate, the main emission line of Hg is smack down the middle of the green part of the spectrum.