The consumers want to see the product they are purchasing. The shops use special lighting in order to sell more,  at the same time as prolonging the opening hours. The price the consumer pays for the combination of increased light exposure and the desire to see food products is that the food can be deteriorated by the light. Dairy products develop off-odour and taste faults (‘sunlight taste’), meat products become grey, oily and fatty products turn rancid and vitamins degrade. However, the question is which light waves are most damaging for the food in the display cabinets?