First flow... followed tutorial, debug messages working, but no lights going on

I wanted to get started with Node-RED using an input boolean I added to a Lovelace panel, so I followed this tutorial. The idea is, I flip the input boolean, and a series of things happens… but I wanted to start with just one light. The message makes it through, but the light doesn’t go on. I can turn the light on directly with its entity ID in Lovelace. This is what I’m seeing:

What have I done wrong? Any help would be appreciated.

You are using the light domain but a switch entity. Change one of them so both are the same.

Thanks! This did it.