Which kind of lightbulb is more energy efficient / cost efficient to operate for the same amount of light: those twisty spiral florecent bulbs or LEDs?

I don’t need too many specifications or technical detail but LEDs I think DO last longer. But what about the cost to operate?

Those LEDs look better to me and the spectrum of light seems more natural. So, cost of the bulbs aside, should we stop replacing the twisty florescents?

I never liked them. But if they are less energy for the same amount of light as an LED I’ll use them where they will work.