Zwave JS Multicast Area Lights & Switches

[davinci]

Could you please explain, why broadcast is faster and if I should/can use it?

Ok, Zwave_JS has multicast, now how do I use it?

Yah broadcast acted as if I was just turning one light on, yet they ALL came on at same time. With multicast, I still had slight chain reaction of lights turning on. Mostly inovellis; 4 dome leak sensors Econet water valve Zooz light switch Zooz 4-in-1 (2) Inovelli 4-in-1 (3) Honeywell smart outlets

Or am I correct that broadcasting just sends “turn on” and all my devices will turn on, no matter what they are? So in my case likely all lights turn on and the covers open.