Make sure non-essential energy use is scheduled ot be off during closing Hours
“Most shopping malls are only open about for about 12 hours per day, yet they are consuming energy 24/7. While some operations (such as security and refrigeration) may be necessary around-the-clock, others are not. Should you really be paying to light an empty building?”
https://electroind.com/top-5-ways-shopping-malls-can-cut-energy-costs/