What model number corresponds with a 2' x 2' fixture with two T8 lamps?

The model number that corresponds with a 2' x 2' fixture with two T8 lamps must reflect the fixture's specifications accurately. Typically, in model numbers for lighting fixtures, segments represent different features such as size, lamp type, and wattage.

In this case, the number '2-2' within the model number indicates that it has two lamps of a specific size or configuration. The fixture is designed to accommodate two T8 lamps, and the number immediately before the 'G-X' denotes the wattage of the fixture. For T8 lamps, a common wattage configuration is 32 watts per lamp, leading to an output that typically averages around 50 watts when considering efficiency and dimming effects.

The model number B, which begins with '50-G-X', signifies that it is a 50-watt fixture specifically designed for two T8 lamps, making it the correct choice for a fixture of this size and lamp type. The other options present wattage configurations that do not align with the requirements for a 2' x 2' fixture housing two T8 lamps. Therefore, option B is the correct match.