《Understanding LEDs.Institution of Lighting Engineers》.pdfVIP

Understanding LEDs lightcast briefings from the ILE technical committee Institution of Lighting Engineers– technical briefing note LED lamp © Olivier Lantzendörffer | D 16 September 2009 This briefing note has been prepared by the ILE Technical Committee for study and application. The document reports on current knowledge and experience within the specified field of light and lighting described and is intended to be used by the ILE membership and other interested parties. This is a briefing note and is not of mandatory status. The ILE should be consulted regarding possible subsequent amendments. Any mention of organisations or products does not imply endorsement by the ILE. Whilst every care has been taken in the compilation of any lists, at the time of going to press, these may not be comprehensive. Compliance with any recommendations does not itself confer immunity from legal obligations. © 2009 Institution of Lighting Engineers. Permission is granted to reproduce and distribute this document, subject to the restriction that the complete document must be copied, without alteration, addition or deletion. 2 Understanding LEDs Contents 1. Introduction 3 2. General 4 3. LED performance 6 4. Luminaire performance 7 5. Driver performance 9 6. Five key questions to ask 10 Appendix 12 1. Introduction Over the past few year