minor edit

README.md

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 **tradfri.py** is the main package handling light control & transition logic. 
 
 
-**light-schedule.py** is a wrapper for tradfri.py which provides command line arguments, and defiens a mapping of friendly device names to HomeAssistant IDs. Cronjobs will call this to initiate state transitions.
+**light-schedule.py** is a wrapper for tradfri.py which provides command line argument parsing, and defines a mapping of friendly device names to HomeAssistant IDs. Cronjobs will call this script to initiate state transitions.
 
 
 **lights-auto.py** is a utility run on your primary Windows machine in the office where lights are located. During daytime, it will transition lights to 'daytime' state based on mouse/keyboard activity. This is required because lights can't transition state when there's no power to them, so turning power on to the lights won't automatically set them in a state which was sent to the hub while they were off.