LIGHT & ENGINEERING, vol.27, no.2, pp.78-87, 2019 (SCI-Expanded)
As the technology advances, the efficiencies of Chip on Board (COB) LEDs are increasing. In this study, the utilization of COB LEDs in an industrial high-bay luminaire, which can be considered as a relatively high power application, has been investigated starting from the initial design process. For an industrial hall, single-chip LED based reference luminaires, which can provide the required lighting quality criteria have been identified. COB LED selection and photometric measurements are done, and the number of COB LEDs to be used has been calculated by targeting the luminous flux value of reference luminaires. The COB LED based luminaire prototype with a plate finned heat sink was modelled by using a CAD software and the computer aided thermal simulations were performed. Then the prototype was manufactured and experimentally analysed. The highest difference between the experimental analysis and the thermal simulation was found to be less than 7 %, which demonstrates the consistency of design and analyses. This study is an example of the steps to be followed in the manufacturing stage of a COB LED based luminaire. Additionally, it is aimed to provide a perspective to the use of COB LEDs in high power applications.