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This paper presents Intelligent Plant Care Hydroponic Box (IPCH-Box) that exercises environment driven control methods through an Internet-of-Things (IoT) management tool called IoTtalk. IoTtalk provides a scalable and configurable software for users to easily and quickly add/remove/exchange the sensors and actuators, and program their interactions. From the experimental measurement results of IPCH-Box,...
In this paper, the algorithm for the stepless tunable four-chip LED on the black body radiation curve, using the Generalized Reduced Gradient method, is proposed. The lumen outputs of four-chip LED, for color temperatures between 2500K and 6500K, are then calculated in real-time, without using a lookup table, and for high quality lighting design.
The optimization matching procedure for specific LED spectrum matching is proposed by the normalized correlation coefficient and generalized reduced gradient method in this study. The different spectrum means different color temperature, color rendering index, and lighting quality features. However, the specific spectrum for human centric lighting or light therapy may not be achieved by single light...
In this study, high efficiency thin film design with low UGR and batwing distribution in LED flat panel lighting is proposed. The batwing distribution can be used to enhance the uniformity for indoor lighting. Therefore, the micro-structure film is designed with v-cut and lenticular to transform the light distribution from lambetrian to batwing and keeps low UGR within 19. In this study, the holes...
Traditional marine lighting with low efficiency has been gradually replaced by high-efficiency electronic lighting equipment. However, these electronic lighting equipment are mainly for land use, and ignore unique lighting requirements of marine use, such as, temperature, vibration, etc. To confirm the applicability of land-use electronic light sources in a marine environment, several existing commercial...
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