| A 48" fixture is going to stay a 48" fixture, despite what bulbs they house. As BoomerD mentions, PC's come in a variety of sizes, but the fixtures still come in the same standard 24", 30", 36", and 48" fixtures.
FWIW, the 36" and the 48" are usually the same setup, only with a longer reflector and housing assembly. Same goes for the 24" and the 30", |