2023-12-05 ミシガン大学
Close-up of a man’s hand installing a long LED light bulb on the ceiling. Image credit: wattanaphob, iStock
◆研究では、蛍光灯をLEDに置き換える際の6つの代替オプションのコストを比較し、プラグアンドプレイ、直結、ハイブリッドLEDが費用対効果が高いことが示されました。これにより、LEDへの切り替えがお金とエネルギーの節約、炭素排出の削減に貢献できることが強調されました。
＜関連情報＞
- https://news.umich.edu/u-m-study-outlines-cost-energy-savings-of-switching-from-fluorescent-lamps-to-leds/
- https://journals.sagepub.com/doi/10.1177/14771535231207810
4フィートT8トロファーのLED改修と照明器具交換のライフサイクルコスト分析 Life cycle cost analysis of LED retrofit and luminaire replacements for four-foot T8 troffers
L Liu , GA Keoleian , and GM Lewis
Lighting Research and Technology Published:November 10, 2023
DOI:https://doi.org/10.1177/14771535231207810
Abstract
Lighting makes up 17% of electrical loads and the largest energy end use in commercial buildings. Linear fixtures are among the largest opportunities for energy efficiency improvement, given their long operating hours. With continued, rapid light-emitting diode (LED) development and more LED replacement products on the market, lighting replacement decisions become more complex and warrant re-examination. With a goal to inform building managers and other decision-makers with practical guidance on lighting replacement, this study is a life cycle cost (LCC) analysis that compares the cost–benefit of six replacement options (one fluorescent and five LED) for a 0.61 m by 1.22 m (2 ft by 4 ft) T8 recessed troffer based on data for 168 lighting products from an online vendor. Results show that direct wire (i.e. unballasted) LED retrofits are the least-cost option to replacing fluorescent lamps in terms of normalized LCC. Plug-and-play lamps suffer from a lock-in with ballasts, but their ease of installation can help spur LED adoption. In cases where an existing ballast is still usable, hybrid LED retrofits provide the least upfront cost option by deferring the cost of rewiring. LED luminaires can offer improved aesthetics and reliability; however, they have high upfront cost. Among them, luminaires with replaceable lamps offer lower cost than those without.
