Perhaps conserving energy is important to you. You’ve switched out all of your incandescent light bulbs with LEDs. You keep your thermostat set at 78 in the summer. You might even get mad at your kids when they leave a light on.
Your neighbor, on the other hand, isn’t quite as concerned. He keeps the thermostat set consistently at 68 and he hasn’t replaced any of his light bulbs because, in his words, who wants to pay $10 for a new one?