Correct key code to put computer to sleep?

I see both Consumer_Sleep under key_defs_consumerctl.h and System_Sleep under key_defs_sysctl.h. Which is the correct keycode to use to put my system to sleep? Why are there two anyway?

As far as I remember, it is System_Sleep. The difference is that System_Sleep is a system-wide sleep, Consumer_Sleep is supposed to initiate “low power state on application-specific device”. I admit I have no idea what that actually means.

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For locking (…not necessarily sleeping) my macbook, I’ve bound the desired key to F14, and then bound that elsewhere as a shortcut for locking the screen.

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