Look at the command pmset, set your preferences and do a before and after snapshot with composer it will show you exactly where and what plist are affected

bash-3.2# pmset Usage: pmset [-b | -c | -u | -a] <action> <minutes> [<action> <minutes>...] pmset -g [disk | cap | live | sched | ups | batt] -c adjust settings used while connected to a charger -b adjust settings used when running off a battery -u adjust settings used while running off a UPS -a (default) adjust settings for both <action> is one of: displaysleep, sleep, disksleep (minutes argument) or: reduce, dps, womp, ring, autorestart, powerbutton, halfdim, lidwake, acwake, lessbright (with a 1 or 0 argument) or for UPS only: haltlevel (with a percentage argument) haltafter, haltremain (with a minutes argument) or: hibernatefile <path> hibernatemode <integer> hibernatefreeratio <integer percent> hibernatefreetime <integer ms> eg. pmset -c dim 5 sleep 15 spindown 10 autorestart 1 womp 1 pmset schedule [cancel] <type> <date/time> [owner] pmset repeat cancel pmset repeat <type> <days of week> <time> <type> is one of: sleep, wake, poweron, shutdown, wakeorpoweron <date/time> is in "MM/dd/yy HH:mm:ss" format <time> is in "HH:mm:ss" format <days of week> is a subset of MTWRFSU [owner] optionally describes the event creator

pmset -a displaysleep 15 disksleep 0 sleep 0 womp 1

display sleep = 15 minutes
disk sleep = 0 off 1 on
sleep = 0 disabled numeral is time to sleep
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Matt Lee, CCA/ACMT/ACPT/ACDT
Senior IT Analyst / Desktop Architecture Team / Apple S.M.E / JAMF Casper Administrator
Fox Networks Group