Design and Application of Daylight-Based Lighting Controller on LED Luminaire

Abstract

This paper proposes a control circuit for Light Emitting Diode (LED) luminaire based on the amount of daylight. This system uses both natural daylight and artificial light from a luminaire to reach the desired illuminance on a working plane. The control circuit operates by receiving an illuminance value from a light sensor and comparing it with a set value in the microcontroller before limiting the light intensity of LED by sending a control Pulse Width Modulation (PWM) signal to the LED driver. In the experimental setup, the controller and a physical model of a working space were built in order to field test the LED daylight control circuit. Electrical characteristics such as voltage, current, and power were measured with a power meter. Illumination characteristics in terms of illuminance on a working plane were determined using a lux meter. The results from actual field tests revealed that this LED control circuit was able to reduce the power consumption of the lighting system while keeping the illuminance on the working plane at the standard value. Both simulation results and the actual experiment of the control circuit proved that it could be used to improve the energy efficiency of both newly installed and retrofitted lighting systems.

Influence of Light Reflection from the Wall and Ceiling Due to Color Changes in the Indoor Environment of the Selected Hall

“…Using daylight instead of artificial lighting can bring significant energy savings, between 30 and 70% of electricity consumption [8]. Similar information on daylight, artificial lighting, and energy-saving can be found in several publications [9][10][11][12][13]. Daylight also improves the quality of the premises and the productivity of employees in the work environment.…”

Light-Emitting Diode (LED) versus High-Pressure Sodium Vapour (HPSV) Efficiency: A Data Envelopment Analysis Approach with Undesirable Output

“…In the passive mode, where the streetlights function without added intelligence, energy savings of 19 to 44% were achieved as compared to commercial luminaires. There is also huge potential for power consumption reduction in the LED lighting system with a control system [53,54]. Energy savings without comprising user visual comfortability has achieved a reduction of 38% energy consumption in an indoor experiment on the control of SPDs of LED lighting [55].…”

“…Pipattanasomporn, Rahman, Flory and Teklu [54] found that an intelligent lighting control system may reduce approximately 74% of energy usage. On the other hand, Bunjongjit, Ananwattanaporn, Ngaopitakkul, Jettanasen and Patcharoen [53] proposed a control circuit for LED luminaire based on the amount of daylight which has been able to reduce the lighting system's power consumption while preserving lighting quality for the user. Smart Grid technology equally has the potential to further increase the efficiency and operational reliability of outdoor lighting systems as discussed by Filimonova et al [56] on an LED outdoor lighting system for a university campus in Russia.…”

The Photometric Test Distance in Luminance Measurement of Light-Emitting Diodes in Road Lighting

“…Light-emitting diodes are among the most popular light sources. LEDs have practically replaced traditional light sources on the market because of their advantages, such as high luminous efficacy [1][2][3], long operating time [4,5], a small size [6], insensitivity to shock, high luminance [7][8][9][10], resistance to low temperatures [11] and easy control [12][13][14][15]. So, in interior lighting, LEDs have replaced fluorescent lamps [16] and in road lighting, they have replaced high-pressure sodium lamps [17,18].…”