Replacement
The study evaluated the expenses of six replacement alternatives-one fluorescent and five LED-for linear recessed lighting systems, revealing that LED goods exhibited 18%-44% greater efficiency than T8 fluorescent lights.
Lighting accounts for 11% of electricity consumption in commercial buildings, as well as in residential basements, garages, and stores. Linear recessed lighting systems, also known as linear fixtures or troffer lights, have significant prospects for enhancing energy efficiency due to their extended running hours.
The primary conclusion of the study is that transitioning to LEDs can result in financial savings, energy conservation, and a diminished carbon footprint, as stated by senior study author Greg Keoleian, co-director of the Centre for Sustainable Systems at the School for Environment and Sustainability.
Keoleian stated that replacing fluorescent bulbs with LEDs is preferable to substituting them with new fluorescent lamps. "Our discovery aligns with the U.S. Department of Energy's assertion that LED systems exhibit 25% greater energy efficiency than fluorescent lights."
According to Keoleian, LED bulbs surpass fluorescent lamps in various aspects. They emit consistent light without flickering, exhibit superior energy efficiency, and possess an extended lifespan, resulting in enhanced ambiance, reduced maintenance, and savings on energy costs.
LEDs provide superior dimming capabilities compared to fluorescent bulbs. They achieve full brightness more rapidly and exhibit greater energy efficiency at low dimming levels. Furthermore, LEDs are devoid of mercury.
Keoleian and his team examined over 160 LED replacement alternatives, encompassing lamp replacements, retrofits, and luminaire replacements.
A lamp replacement is substituting only the lights without necessitating any electrical alterations, whereas a retrofit involves altering the current fixture to support a new light source or electronic components. A luminaire replacement entails a complete overhaul of the lighting system, encompassing the mechanical framework.
The researchers evaluated the expenses associated with six replacement alternatives:
• Substituting a burnt-out fluorescent lamp with a fresh fluorescent lamp (not advisable).
• Substituting a fluorescent bulb with a plug-and-play Type A LED lamp, which necessitates no alterations to the existing unit and is compatible with both electronic and magnetic ballasts.
• Engaging an electrician to modify an existing fixture by employing a ballast bypass or direct-wire Type B LED bulb.
• Employing a hybrid Type AB LED light compatible with an existing fixture or one from which the ballast has been eliminated.
• Purchasing a whole new recessed luminaire that employs an LED bulb, enabling customers to modify the style and obviating the necessity for ballast replacement.
• Purchasing a whole new recessed luminaire featuring an integrated, non-replaceable LED light.
Their principal findings indicated that plug-and-play, direct wire, and hybrid LEDs are all more economical and energy-efficient alternatives to fluorescent bulbs.
Plug and play LEDs (Type A) are compatible with existing fixtures; nevertheless, ballasts may deteriorate prior to the lamp's failure. Their simple installation may facilitate the use of LEDs.
Hybrid LEDs (Type AB) provide the lowest initial expenditure when a pre-existing ballast remains functional.
Direct-wire LEDs (Type B) provide the most economical choice regarding operational, maintenance, and life cycle expenses. Their installation expenses are comparatively elevated.
LED luminaires featuring replaceable lamps are less expensive than those with incorporated non-replaceable lamps, although they provide fewer design alternatives.
"These findings underscore the trade-offs involved in selecting LED options and can assist commercial building owners and managers contemplating lighting replacement," stated Keoleian, who has previously examined the energy and economic benefits of substituting incandescent bulbs with LEDs.
The precise savings are contingent upon the costs of lamps, electricity rates, and labour expenses for an electrician when retrofitting or replacing the recessed fixture, according to Keoleian.
All LED alternatives, with the exception of acquiring an entirely new lighting system (luminaire), yield long-term cost savings. A completely new luminaire entails an increased life cycle cost due to the elevated initial expense of a new unit.
The findings are relevant to residential structures utilising T8 bulbs and troffers, especially in workshops, basements, and garages, according to Keoleian.
Shenzhen Benwei Lighting Technology Co., Ltd was established in 2010. It is a national high-tech enterprise integrating design, R&D, production and sales of indoor and outdoor lighting products and also can do OEM ,ODM .For more details about our offerings, please contact us at bwzm18@ledbenweilighting.com
