This will allow you to purchase a smaller unit, saving you money on the upgrade and operating costs. This is why all hard, sugary candies will produce a faint glow when cracked. Techie energy-saving gifts that keep on giving From flashy light displays to practical hardware devices, energy-efficient gifts will keep ‘giving’ long past the holiday season. You can buy electricity usage monitors at most hardware stores for around $25-$50. Electricity usage monitors are easy to use and can measure…