Voice Control system over a local network

Hello everyone,
I am doing a project where I have to control a lighting system(turn on/off and basic settings) using voice command within a local network i.e. No Internet. I am new to this NodeRed so can you please suggest to me a way to do it?

Hi and welcome to the forum! There's a lot of existing topics about that. You could check for example [Announce] node-red-contrib-voice2json (beta) as a start. You'll find more using the search tool.