The optimum choice in that case would be fluorescent lighting. The HID light source is used in warehouse style applications with higher ceilings, i.e. supermarkets. HID is also energy effiicient and offers a long lamp life with satisfactory color rendition. It is obvious that retailers catering to lower-end markets would not ever consider using decorative task lighting, not only because of the higher expense involved but because it simply would not appeal to their patrons. By using only general illumination, retailers are able to to indicate that they specialize in selling lower cost merchandise.
Light is directly related to the retailer's marketing mix.
Light along with proper interior design becomes a marketing tool. Even though lighting is only considered a part of a complete interior space, it is one of the most innovative and important components of a retail establishment. Lighting is the jewel on the crown. It is because lighting has become multifunctional. Proper lighting indicates that the retailer is open and welcomes the customers.