卤素灯泡（英文：Halogen lamp），又称钨卤灯泡、石英灯泡，是白炽灯的一个变种。

白炽灯具有很多的优点：制作简单、成本低廉、亮度容易调整和控制及显色性明显（Ra=100）等等，致命缺点为寿命短、发光效率低（仅有12％－18％可转化为光能，而其余部分都以热能散失）及色温低（2700-3100K）。卤素灯泡则保留了上述优点之外，寿命有所增加、发光效率亦有提高。

A halogen lamp, also known as a tungsten halogen, quartz-halogen or quartz iodine lamp, is an incandescent lamp that has a small amount of a halogen such as iodine or bromine added. The combination of the halogen gas and the tungsten filament produces a halogen cycle chemical reaction which redeposits evaporated tungsten back onto the filament, increasing its life and maintaining the clarity of the envelope. Because of this, a halogen lamp can be operated at a higher temperature than a standard gas-filled lamp of similar power and operating life, producing light of a higher luminous efficacy and color temperature. The small size of halogen lamps permits their use in compact optical systems for projectors and illumination.