Infrared bulbs are specialized light bulbs that emit infrared radiation, which is a type of energy that we feel as heat. They are commonly used in various applications, including heating lamps for pets, food warming in restaurants, and therapeutic treatments for muscle pain. These bulbs can provide warmth without needing to heat the surrounding air, making them efficient for targeted heating. These bulbs come in different shapes and sizes, often featuring a reflective coating to direct the heat where it's needed. Infrared technology is also used in other devices, such as remote controls and night vision cameras, showcasing its versatility beyond just lighting.