The Comparison of Electrical Energy and the Economics of T8 LED bulbs with Spherical LED bulbs

Main Article Content

ประสิทธิ์ สุขเสริม
สิริวิช ทัดสวน



This research compares T8 LED bulbs electrical energy and economics and Spherical LED bulbs used in pedestrian walkways. It aims to identify the advantages/disadvantages in terms of electricity consumption and economics. The voltage phase angle control circuit was designed and built for use with 5 adjustable brightness Spherical LED bulbs in the testing process. The Arduino Uno R3 microcontroller board was used for processing. It is then deployed to pedestrian walkways with PIR sensors to detect pedestrians. Setting the usual condition that no one walks through, all the lamps will have low brightness. Conversely, when someone crosses the path, the lamps will gradually increase their brightness simultaneously, all lights until they reach their maximum value and last until the delay time. After that, all the lamps will gradually dim down to the set minimum value again. The researcher recorded the electrical energy used during the period of 6:00 p.m. – 6:00 a.m. for a total of 30 days. The recorded energy values are compared with the energy values used by 3 conventionally installed T8 LED bulbs. The results showed that the energy consumption of Spherical LED bulbs was lower than that of T8 LED bulbs equal 35.7%. Nevertheless, the cost of using Spherical LED bulbs is higher than that of T8 LED bulbs, with a payback period of 4.74 years. However, if considering the long service life or the use of the lamp in a vast area, Spherical LED bulbs with voltage phase angle control technique will save more electricity costs than using T8 LED bulbs lamp work.


Download data is not yet available.

Article Details

How to Cite
สุขเสริม ป., & ทัดสวน ส. (2021). The Comparison of Electrical Energy and the Economics of T8 LED bulbs with Spherical LED bulbs. SAU JOURNAL OF SCIENCE & TECHNOLOGY, 7(2), 15–26. Retrieved from
Research Article


B. Devenish.(2021, July. 25) .“A guide to LEDs in lighting design”[Online]. Available:

H.I Hsieh and H. Wang,“LED Current Balance Using a Variable Voltage Regulator with Low Dropout vDS Control,” Applied Sciences 7(2):206, Feb 2017

R. M. Abdalaal and C. N. Man Ho, “Characterization of Commercial LED Lamps for Power Quality Studies,” IEEE Electrical Power and Energy Conference (EPEC), Saskatoon, SK, Canada, 22-25 Oct. 2017.

P. Sukserm,“Comparison Illuminance, Electrical Performance, Harmonic and Energy-saving During Normal Fluorescent Lamps and Fluorescent LED,” The 3 rd SAU National Interdisciplinary Conference, Richmond Stylish Convention Hotel, Thailand, 23 Jun. 2016.(in thai)

S. Adhigunarto, E. Mulyana and W. Surya, “The Analysis of Harmonics on LED Lamps,” International Symposium on Materials and Electrical Engineering (ISMEE) 2017. Conf. Series: Materials Science and Engineering 384 (2018) 012061 DOI : 10.1088/1757-899X/384/1/012061

H. Jin and etc., “Performance of LED Street Lights with Different Color,” IEEE Photonics Journal Lighting, vol. 7, no. 6, Dec. 2015.

D. G. Fink and H. Wayne Beaty, Standard Handbook Electrical Engineering, 1993.

IEEE Std C57.110 IEEE Recommended Practice for Establishing Transformer Capability When Supplying Non-sinusoidal Load Currents, 1998.

P. Sukserm and S. Tadsuan, “Comparison of testing results of Oil-immersed Transformer under Linear load and Non-linear load conditions,” SAU JOURNAL OF SCIENCE & TECHNOLOGY, vol.4, no. 1, Jan. 2018. (in thai)

Sukhothai Thammathirat open University (2021, Jun.10).“Project feasibility analysis tool”[Online].Available: thai)

Microchip. (2021, Jun. 3).“ATmega328-8bit-Microcontrollers” [Online]. Available :

Electronic Components Datasheet Search (2021, Jul. 20). Available: https://

Thailand law safety hot sound luminaire 2549 (2021, Aug. 25). Available: https:// (in thai)

electricity tariff Residential house type of the Metropolitan Electricity Authority(2021, Jul. 4). Available: https:// (in thai)

Most read articles by the same author(s)