Opinions expressed by Entrepreneur contributors are their own. No matter how carefully you plan your store displays and merchandise, your hard work could all be lost in window glare and shadows.

Walmart has announced plans to purchase energy-efficient LED ceiling lighting fixtures for its new supercenters in the United States, stores in Asia and Latin America, and Asda locations in the United ...

Could you design a box that could trap light inside of it? Of course you can. In fact, you likely have a device in your home right now that not only traps light and stores it—it keeps it cold, too!