Are heat lamps designed to reheat food when food falls under 135 degrees? Answer: No, heat lamps are not designed to reheat food. They are designed to keep already cooked food warm and prevent it from falling below the safe temperature of 135 degrees Fahrenheit. When food falls below 135 degrees Fahrenheit, it enters the temperature danger zone where bacteria can grow rapidly, and it can become unsafe to eat. At this point, the food needs to be reheated to a safe temperature of at least 165 degrees Fahrenheit to kill any bacteria that may have grown. Heat lamps are commonly used in commercial kitchens and buffet lines to keep food warm until it is ready to be served. They work by using infrared radiant heat to keep food at a constant temperature. However, they are not designed to increase the temperature of cold or undercooked food, and using them in this way can put the food at risk of illness-causing bacteria. It is important to ensure that food is cooked to the proper temperature and kept at the appropriate temperature, either hot or cold, to prevent contamination and ensure food safety.