is there any way to toggle cololights ?

[AquaCobell]

something like light.toggle() and when they're on they go off and vice versa

[BazaJayGee66]

No way to toggle, as brightness value must be passed when turning on.

You could use a simple if statement to toggle however.

This will turn the light off if it's on, otherwise turn on at 100 brightness:

light.on = 0 if light.on else 100