Correspondence: Comparing LED luminaires

Understanding Heat Transfer Mechanisms in Recessed LED Luminaires

Reduced maintenance cost due to the long life of light-emitting diodes (LEDs) has attracted the lighting community to this rapidly evolving lighting technology. A high LED junction temperature negatively affects the performance of LEDs. To realize the long-life potential of LEDs, proper thermal management is necessary. This paper describes a numerical and experimental investigation of thermal s...

Luminaires: Linear Fluorescent Luminaires

A large portion of the commercial and industrial lighting systems currently in use was put in place between 1960 and 1990, according to statistics. The systems that are in place often rely on the use of manually controlled incandescent and standard fluorescent lighting with magnetic ballasts, or even mercury vapor systems. These types of lighting systems and lighting controls are generally less...

Luminaires: High Intensity Discharge Luminaires

While proper illumination is needed in commercial and industrial settings, the selection of the right lighting system can make a significant difference in energy consumption. Energy savings of up to 50 percent or more are possible in some cases. Less efficient indoor lighting sources often create heat as well as light, and can be a serious source of excess heat in buildings. The additional cool...

An accelerated test method of luminous flux depreciation for LED luminaires and lamps

Light Emitting Diode (LED) luminaires and lamps are energy-saving and environmental friendly alternatives to traditional lighting products. However, current luminous flux depreciation test at luminaire and lamp level requires a minimum of 6000 h testing, which is even longer than the product development cycle time. This paper develops an accelerated test method for luminous flux depreciation to...

Accelerated Lifetime Testing of OLED Luminaires