California IDEX Practice Exam

The requirement to have at least one half of installed wattage in high-efficacy luminaires is indeed an important aspect of the energy conservation standards set by Title 24. However, the question specifically asks for a specification that is NOT required for lighting in a bedroom, which means option D is the correct choice.

For bedrooms, while there are various specifications aimed at enhancing energy efficiency, the specifics regarding high-efficacy luminaires don't apply universally as a stand-alone requirement for all bedroom settings. This allows for a broader variety of lighting options without the necessity of meeting that exact wattage condition for high-efficacy installation.

The other options highlight more immediate requirements for bedroom lighting under Title 24. For example, the need for dimmers and vacancy sensors are both aimed at promoting efficiency and effective energy management in residential settings. Lights being low efficacy is also a mandatory aspect to ensure that all installed lighting meets certain efficacy standards defined by Title 24.

Thus, understanding this context is crucial in distinguishing which requirements are generally mandated versus which ones may not apply in all situations, particularly in residential bedrooms.