Thus far I don't think there's any official 2D Lights category of actions but if you're lucky, you might look into the action that does this in 3D, open it in an editor and eventually look into the scripting manual for Unity and see if you can change the code so as to target a 2D light and also change its properties.
You might also drag the 2D Light component into a Get/Set Properties action and fiddle with it that way.