But "The Clapper" would do just as well in the case where you are in bed, and is less complex, less expensive, and doesn't send your claps to the cloud.
"Clapper set lights to red." I like to set the temperature of the lights to a single color at night so as to not mess up my circadian rhythms. Looks like clapper fits the bill.
which might or might not be good enough. Alexa can turn on other lights, play various types of music, give you the weather... Depending on what you want this might be worth it.
Home automation systems (Home assistant, openhab...) are making good progress on local only voice control as well.