Sustainability in lighting for public spaces involves considering energy efficiency, longevity, and environmental impact. LED (Light Emitting Diode) lighting is the most sustainable option because it has the highest energy efficiency (up to 80% more efficient than traditional lighting), a longlifespan (up to 50,000 hours), and contains no hazardous materials like mercury. Option B (daylight) is sustainable but not a “light source” in the traditional sense, as it relies on natural conditions and cannot be controlled for consistent use in public spaces. Option C (halogen) is energy-inefficient and has a short lifespan. Option D (fluorescent) is more efficient than halogen but less so than LED, and it contains mercury, posing environmental disposal concerns.
Verified Answer from Official Source:
The correct answer is verified using NCIDQ IDFX content on sustainable design and lighting.
Exact Extract:TheNCIDQ IDFX Reference Manualstates, “LED lighting is the most sustainable light source for public spaces due to its high energy efficiency, long lifespan, and lack of hazardous materials.”
The NCIDQ IDFX curriculum emphasizes sustainable design principles, with LED lighting being the preferred choice for energy efficiency and environmental impact in public spaces.
Objectives:
[References:, NCIDQ IDFX Reference Manual (Section on Sustainable Design)., IESNA Lighting Handbook (Sustainable Lighting Practices)., ]
