A way to avoid delays of whole seconds is to create 3 flows which control 1/3 of the lights each.
Flow 1 switches on say 3 lights and starts flow 2
Flow 2 switches on another set of 3 lights and starts flow 3
Flow3 switch on the last set of 3 or 4 lights .
Flows are started x msecs after eachother, which is a lot quicker then adding a delay of 1 sec between every set of 3 lights.
Another option is to use the < group > app. It can group anything with similar possibilities, like dim, on/off & hue etc. etc.
It has a build in option, to switch every item in the group with a little delay in between every device. It’s adjustable per msec.
So the action card becomes one card
