Fortunately there are people that have ventured beyond the question of whether the refrigerator light actually goes off when the door is closed. And they have developed a more energy efficient lighting system for refrigerator cabinets. Now you might be asking: “Why is his a priority? Did they conclude it stays on?” The new LED system designed by Poly Optics is actually aimed at the large commercial units that are often open or feature glass doors. The owners, mostly retailers, of these units want the contents to be well lit without generating excessive heat or consuming more power than is necessary.