蛍光灯からLEDへの切り替えによるコストとエネルギーの節約を概説(U-M study outlines cost, energy savings of switching from fluorescent lamps to LEDs)

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2023-12-05 ミシガン大学

蛍光灯からLEDへの切り替えによるコストとエネルギーの節約を概説(U-M study outlines cost, energy savings of switching from fluorescent lamps to LEDs)Close-up of a man’s hand installing a long LED light bulb on the ceiling. Image credit: wattanaphob, iStock

◆ミシガン大学の研究によれば、LED照明は4フィートの蛍光灯よりも最大で44%効率が高く、商業施設や住宅の照明の11%を占める節電の大きな機会があると報告されています。LEDの方がエネルギー効率が高く、寿命が長く、調光性能が優れており、水や空気に対しても安定性があります。
◆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。

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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.

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