The correct answer is B) Low-pressure mercury fluorescent. The low-pressure mercury fluorescent lighting fixture is the type represented in the diagram shown in figure "A" of illustration EL-0081. This is because low-pressure mercury fluorescent lamps use a small amount of mercury vapor to generate ultraviolet radiation, which in turn excites a phosphor coating on the inside of the lamp to produce visible light. This lighting technology is commonly used for general illumination in marine and other applications. The other options are incorrect because high-pressure mercury fluorescent, high-pressure sodium, and low voltage quartz lamps have different operating principles and appearances that do not match the diagram provided.