Energy Efficiency & Sustainability Flashcards
7 cards from real CLC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Energy Efficiency & Sustainability flashcards as text
What is the primary purpose of commissioning a lighting control system after installation?
Answer: To verify that controls operate as designed and deliver intended energy savings
Commissioning confirms that sensors, dimmers, and schedules function correctly so the system achieves its designed energy performance.
According to the DOE, what percentage of US electricity consumption is attributed to lighting across all building sectors?
Answer: About 17%
The DOE estimates lighting accounts for approximately 17% of total US electricity consumption across residential, commercial, and industrial sectors.
Which of the following is an example of 'integrated design' in sustainable lighting?
Answer: Coordinating lighting, HVAC, and envelope design to minimize total building energy use
Integrated design coordinates all building systems early in design to optimize overall energy performance rather than optimizing each system independently.
A CLC is tasked with reducing light pollution for a new outdoor parking lot. Which fixture characteristic is most important to specify?
Answer: Full cutoff or cutoff classification with zero uplight
Full cutoff fixtures direct all light downward with zero uplight, preventing sky glow and light trespass onto neighboring properties.
What does the ENERGY STAR certification for luminaires primarily verify?
Answer: The fixture meets minimum efficacy, quality, and reliability requirements
ENERGY STAR luminaire certification requires minimum efficacy thresholds, color quality standards, lumen maintenance, and warranty requirements.
When calculating simple payback for an LED retrofit, which formula is correct?
Answer: Installed cost ÷ annual savings
Simple payback period (years) = installed cost ($) ÷ annual savings ($/year).
Which sustainable design principle does 'right-lighting' refer to in the context of energy efficiency?
Answer: Providing exactly the light needed for each task—no more, no less
Right-lighting means delivering the appropriate quantity and quality of light for each specific task or space, avoiding over-illumination that wastes energy.