How protective compounds and thermal management are enhancing the performance and prolonging the life of LEDs. It is hard to ignore the phenomenal growth of the LED market, spurred on by new applications, advertisements for energy savings and company policies to switch to more efficient lighting systems. In conjunction with the design freedom and application […]
The application landscape for quantum dot (QD) technology is rapidly evolving and QDs are already used in display applications. This article discusses the innovation and commercialisation frontiers of this technology. Quantum dots (QDs) in displays are nothing new. They are being used to widen the colour gamut of liquid-crystal displays (LCDs), enabling these devices to […]
This article explores the perception of colour across cultures and highlights the use of colour in corporate branding. Never underestimate the importance of selecting the right colour to represent a brand. Every colour used in branding has a psychological link or message. It is, however, very important to remember that these psychological links can differ […]
This article focuses on establishing the correct lighting design criteria for road and street lighting projects. Defining and evaluating lighting design specifications can be a challenging task but, as many professionals are coming to realise, comparing lighting design proposals from different companies can be even more challenging. Given all the criteria that professionals must take […]
Chromaticity difference is specified for colour uniformity, shift in colour during lifetime and individual colour variation of products, and others. The chromaticity difference of light stimuli, in general, is expressed by the distance in the CIE 1976 uniform chromaticity scale (UCS) diagram (CIE, 2004; ISO/CIE, 2009), known as the CIE (u’,v‘) chromaticity diagram or simply […]
A well-conceived surge protection concept for LED lights should be incorporated at the design stage. In the process of retrofitting streetlights, conventional luminaires are frequently replaced by LEDs. The reasons for this include, for example, energy efficiency, subsidy programmes, removal of certain lamp technologies from the market and the long lifetime of the new LED […]
LED lighting has advanced considerably in the past few years, but still has problems with the quality of light produced and lighting device control. Quantum dot (QD) technology offers a solution to many of the problems with current LED lighting products. This technology was initially applied to luminous displays and television (video) screens but is […]
The process used to determine thermal resistance values from the LED junction-to-case and LED junction to Ts reference point. Part 1 of this article discusses measuring junction-to-case thermal resistance; determining the K-factor and testing Rth J-C (see Vector, March 2019, page 25). Thermal performance is the most critical aspect of a well-designed LED lighting system. […]
The process used to determine thermal resistance values from the LED junction to case and LED junction to Ts reference point. Thermal performance is the most critical aspect of a well-designed LED lighting system. Lighting installations with proper thermal designs have higher efficacy, meaning more light can be extracted using less energy, providing better long-term […]
Correlated colour temperature and colour rendering index are becoming outdated as lighting metrics such as LED technology develops and customers become discerning. Selecting the correct LED lighting products for both exterior and interior spaces has become essential in today’s fast-growing built environment and, with the advancement of LED, it is now easier to select suitable […]
