How is the Operational Failure of LED Fixtures Identified?

Selecting the most effective light source or lighting system for a given application requires the comparison of a number of figures of merit for the options under evaluation. One of the most important characteristics to consider is the useful lifetime of the lighting system. For aviation lighting, knowing the expected useful life of airfield luminaires allows designers, airport owners, administrators, and operators to make informed decisions that impact initial and operational costs, maintenance programs, and overall service reliability. Light-emitting diode (LED)-based solutions have become more prevalent in airport systems because of their potential to aid pilots’ visibility and the impressive improvements that this technology has seen in the last few years, including energy efficiency and their potential for long life. While the rated life of commercially available LED systems, usually between several to tens of thousands of hours, is much longer in comparison to the incandescent lamp-based products they are replacing, there is no clear definition of an airfield’s luminaire life. Additionally, because of the recent history of LEDs in the market, there is no sufficient field information to fully validate the long-life claims of such products. Funded by the Federal Aviation Administration (FAA) and the Alliance for Solid-State Illumination Systems and Technologies (ASSIST), researchers at the Lighting Research Center (LRC) conducted a laboratory study to understand the long-term performance of LED systems as a starting point to develop a functional definition of useful lifetime for airfield luminaires. To complement this body of research, LRC researchers are working presently on the development of an accelerated test method to project catastrophic failure of LED systems.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References;
  • Pagination: 6p
  • Monograph Title: 2014 FAA Worldwide Airport Technology Transfer Conference Proceedings: Innovations in Airport Safety and Pavement Technology

Subject/Index Terms

Filing Info

  • Accession Number: 01538257
  • Record Type: Publication
  • Report/Paper Numbers: S10106
  • Files: TRIS, ATRI, USDOT
  • Created Date: Sep 9 2014 7:08AM