I have my entire living room (which also includes the dining room) set up to turn off via voice command. Why? This covers 4 light switches worth of lights. T

I have my entire living room (which also includes the dining room) set up to turn off via voice command. Why? This covers 4 light switches worth of lights. They also auto-turn off at 1am via Alexa routine. Also I can change the colors of all the lights (and do sometimes - at Xmas parties I have a script which slowly cycles all the lights between green and red). For sure if I could make all this work cheaply without needing an internet connection, I would do so.