Energy estimation and photometric measurements of LED lighting in laboratory
Electricity demand is prevailing all over the world now and energy management becomes very complex. This paper aims at providing solution for power demand and energy management by using HB white LED lights for domestic applications. LED lights consume very less power and gives out high energy in the form of brightness. A laboratory model is created in DIALUX 4.11 using CAD window and is illuminated with LED lights. Photometric measurements and energy evaluation are done for the laboratory model with room components of different construction materials in the presence of LED lighting. Reflectivity of different materials under illumination is determined. Simulation is done for varying brightness and calculated results are carried over to Pov-Ray 3.6 for determining the real lighting appearance of the laboratory model. Energy evaluation is done for a year and photometric values of lighting system are measured. The calculated results proves that LED lighting system can be used as an efficient lighting system for domestic purposes when compared to other lighting systems. Simulated results and photometric values of LED lighting are presented here.
Power quality analysis in light emitting diode lamps
Lighting system plays an important role in every life to increase quality of life and working efficiency. As population increase, urban area has been grown rapidly resulted in increased energy consumption in every section including lighting system. With the current attention in energy and environment issue, many governments have set policy to increase energy efficiency. In lighting system, conventional luminaire with low energy efficiency has been replaced with newer technology with low energy consumption and high energy efficiency such as light emitting diode (LED). Today, LED luminaire has taken considerable proportion of market share; however, the main concern regarding changing conventional lamp toward LED is power quality. This paper aims to study power quality issue in term of generated harmonics from lighting system consisting of LED lamps. The result indicates that LED lamps generate significant amount of current harmonic and cause a distortion in waveform. Thus, it needs taking power quality issue into account before replacing or installing LED into lighting system.
SLL Lighting Handbook
The SLL Lighting Handbook has been written to forge a link between the Society's existing major publications; the SLL Code for Lighting (which offers recommendations on lighting for a wide range of applications) and the SLL Lighting Guides (which provide detailed guidance on specific lighting applications). The SLL Lighting Handbook is designed to be complementary to the SLL Code for Lighting but to go beyond it in terms of applications and background information without getting into the fine detail of the Lighting Guides. The Handbook is intended to be the first-stop for anyone seeking information on lighting. It is aimed not just at lighting practitioners but also at lighting specifiers and students of lighting. For all three groups it is comprehensive, up-to-date and easily understandable. The contents summarise the fundamentals of light and vision, the technology of lighting and guidance on a wide range of applications, both interior and exterior.