Study of high power light emitting diode (LED) lighting system in accelerating the growth rate of Lactuca sativa for indoor cultivation

2012 ◽  
Vol 7 (11) ◽  
Author(s):  
Le-Yan Chin
Keyword(s):  
Growth Rate ◽  
Lactuca Sativa ◽  
High Power ◽  
Light Emitting Diode ◽  
Lighting System ◽  
Light Emitting ◽  
Led Lighting

scholarly journals Optimized LED-Integrated Agricultural Facilities for Adjusting the Growth of Water Bamboo (Zizania latifolia)

2020 ◽  
Vol 10 (4) ◽  
pp. 1330
Author(s):  
Vincent K. S. Hsiao ◽  
Teng-Yun Cheng ◽  
Chih-Feng Chen ◽  
Hao Shiu ◽  
Yong-Jin Yu ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Winter Season ◽  
Lighting System ◽  
Zizania Latifolia ◽  
Light Emitting ◽  
Led Lighting ◽  
Led Light ◽  
Bamboo Leaves

We investigated a light emitting diode (LED) lighting system applied to a water bamboo field during winter season at night, and the results indicated that this lighting system can prevent the stunting of water bamboo leaves and further assist its growth. Compared with previous LED systems, in which the LED bulbs were placed directly above water bamboo leaves, our LED lighting system presents the benefit of easy handling during harvest. To prevent the inhomogeneous coverage of LED light patterns, a new design of LED lenses was also incorporated.

Design of Light Emitting Diodes (LEDs) Lighting System and Its Application in Garden Landscape Decoration

2020 ◽  
Vol 15 (6) ◽  
pp. 734-742
Author(s):  
Hailiang Liu ◽  
Jiade Cheng ◽  
Asnidar Hanim Yusuf
Keyword(s):  
Control System ◽  
Large Scale ◽  
Light Emitting Diode ◽  
Image Data ◽  
Junction Temperature ◽  
Lighting System ◽  
Light Emitting ◽  
Led Lighting ◽  
Arm Processor ◽  
Control Node

Light Emitting Diode (LED) is widely used in garden landscape decoration because of its small size, low power, concentrated light, and the capability of showing more vivid colors. While designing the LED lighting system, considering that a single Advanced RISC Machine (ARM)-based control system cannot achieve large-scale LED display, and a single Field Programmable Gate Array (FPGA)-based control system cannot control the lighting system well, an LED system with the combination of ARM processor-FPGA is proposed. In this system, the ARM processor is used as the major control component. The Linux system realizes remote monitoring and intelligent management of image data. In addition, FPGA is used for LED data output. The lighting system consists of a major control node and a lighting node. The nodes are connected in parallel through a chain network. The major control node uses an ARM Cortex processor and is equipped with a Linux operating system. The lighting node uses ARM + FPGA hardware architecture. During the experiments, the LED lighting system is tested first. The results show that the reading and writing speed is fast. The LED display screen meets the lighting requirements. This LED lighting system is used for night lighting of garden landscapes. During the brightness test, the brightness of lighting objects and the background is used as research objects. Experiments have proved that the ratio of the lighting object brightness to the background brightness between (Yu, M. and Li, X., 2012. A little current k-factor method for measuring junction temperature of aviation lighting power led. Guangxue Jishu/Optical Technique, 38(3), pp.371–375; Monas, A., Verma, A., Gawari, A. and Paswan, R. S., 2016. Portable network monitor using arm processor. Procedia Computer Science, 92, pp.493–497.) is suitable for night lighting of garden landscape decoration, which will not bring discomfort to people who enjoy night scenery.

scholarly journals Design and Implementation of a radio controlled led lighting system

2016 ◽  
Vol 10 (1) ◽  
pp. 29-34 ◽  
Author(s):  
Ádám Bálint ◽  
József Sárosi
Keyword(s):  
Radio Frequency ◽  
Light Emitting Diode ◽  
Lighting System ◽  
Light Emitting ◽  
Led Lighting ◽  
Led Light ◽  
Design And Implementation ◽  
Technological Advances ◽  
History Of ◽  
Indoor Lighting

Technological advances allow us to control LED (Light Emitting Diode) lighting at home, in the office it can even allow us to change the intensity of the light and this is just the beginning of what the future holds for us. In this study an LED internal lighting fixture of our own design will be presented focusing on each step in its design. Firstly, the features, types and history of LEDs will be presented, next the products available in market that are required for the completion of the device. Finally, the design and implementation as well as the radio frequency controlled LED indoor lighting fixture will be shown.

scholarly journals A Supervisory Control Strategy for Improving Energy Efficiency of Artificial Lighting Systems in Greenhouses

Energies ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 202
Author(s):  
Gianluca Serale ◽  
Luca Gnoli ◽  
Emanuele Giraudo ◽  
Enrico Fabrizio
Keyword(s):  
Control Strategy ◽  
Light Emitting Diode ◽  
Cost Savings ◽  
Energy Performance ◽  
Lighting System ◽  
Light Emitting ◽  
Artificial Lighting ◽  
Lighting Control ◽  
Lighting Systems ◽  
Power Densities

Artificial lighting systems are used in commercial greenhouses to ensure year-round yields. Current Light Emitting Diode (LED) technologies improved the system efficiency. Nevertheless, having artificial lighting systems extended for hectares with power densities over 50W/m2 causes energy and power demand of greenhouses to be really significant. The present paper introduces an innovative supervisory and predictive control strategy to optimize the energy performance of the artificial lights of greenhouses. The controller has been implemented in a multi-span plastic greenhouse located in North Italy. The proposed control strategy has been tested on a greenhouse of 1 hectare with a lighting system with a nominal power density of 50 Wm−2 requiring an overall power supply of 1 MW for a period of 80 days. The results have been compared with the data coming from another greenhouse of 1 hectare in the same conditions implementing a state-of-the-art strategy for artificial lighting control. Results outlines that potential 19.4% cost savings are achievable. Moreover, the algorithm can be used to transform the greenhouse in a viable source of energy flexibility for grid reliability.

Phosphor concentration and geometry for high power white light emitting diode

2010 ◽  
Author(s):  
Kyung-Mi Moon ◽  
Se-Hwan An ◽  
Hyung-Kun Kim ◽  
Jung-Hye Chae ◽  
Yong-Jo Park
Keyword(s):  
White Light ◽  
High Power ◽  
Light Emitting Diode ◽  
Light Emitting

High-Power CW Operation of GaInAsP/InP Superluminescent Light-Emitting Diode with Tapered Active Region

2001 ◽  
Vol 40 (Part 2, No. 7A) ◽  
pp. L678-L680 ◽  
Author(s):  
Takeshi Yamatoya ◽  
Shigeaki Sekiguchi ◽  
Fumio Koyama ◽  
Kenichi Iga
Keyword(s):  
Active Region ◽  
High Power ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Cw Operation
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