LED Lighting

Aiming at outdoor applications, Lumileds has created Luxeon XR-M light engines. The building blocks combine 3, 4 or 5 Luxeon M LEDs on a metal core PCB for streetlights, and high bay and low bay luminaires. LEDs are spaced to suit “industry standard optics”, said the firm. 3,300 to 5,500 lm is available in colour temperatures of 4,000, 5,000 or ...

How do you get that ‘whiter than white’ look in clothing? You add fluorescent dyes to the cloth that absorb short wavelength sunlight – violet and ultra-violet – and re-emit it as blue. Visually, this extra blue works against any yellowing of ‘white’ cloth to give a white-than-white look. This same fluorescence is what makes some clothes glow under ‘black ...

UK GaN-on-silicon LED maker Plessey will be demonstrating smart lighting concepts at LuxLive in London later this month, starting with a lightbulb that combines illumination with the functions of a mobile phone bluetooth headset – it has microphone, speaker, processing and Bluetooth radio. “Lights help change the use of a room and because there are lights in every room in ...

Solar panels based on thin-film technology which are designed to work more efficiently than other photovoltaic (PV) panels in low light and cloud have been installed on the roof of Parliament Buildings in Belfast. Supplier Beacon Renewable Energy has worked with German thin-film solar module producer Calyxo to create a solar energy system which is suited to the Northern Ireland ...

GaN-on-GaN LED maker Soraa is building a semiconductor fab in Syracuse New York, in partnership with the State of New York. The firm, which has a fab in Fremont California, is working with SUNY College of Nanoscale Science and Engineering, shell completion is scheduled by the end of this year, and production for the second half of 2016. It was announced in ...

Osram is the latest company to add ‘filaments’ to its lighting LED portfolio. Filament LEDs are phosphor-coated strings of tiny LEDs, designed to look like incandescent filaments in art bulbs (see photo). Plessey announced filament production in July, and Osram started selling its own LED filament bulbs earlier this month. “Incorporating the LEDs in classic lamp production lines is very ...

Led Engin is claiming a flux density record  with a combination of red, green, blue and white die that deliver 3,800 lm from 25 die in a 6.2 x 6.2 mm square on a 12 x 12mm substrate. Power input is 80W, leading to the claim of a “new world record in both flux and power density for high power, ...

Plessey is to develop packaged LEDs for circadian-modulated LED lighting systems from Massachusetts firm Circadian ZircLight. Developments at Circadian, according to Plessey, build upon a growing body of research showing that exposure to light at night causes a disruption of brain neuroendocrine systems, including melatonin and cortisol rhythms. “We are developing a set of human-centric LED product solutions to provide ...

Osram Opto Semiconductors is unveiling a 2,000 lm prototype headlamp LED at next week’s ISAL 2015 automotive lighting symposium. Called Oslon Black Flat S, the five-die surface-mount device has better chips and improved thermal management compared with its predecessor. The linear arrangement, lens-less construction and anti-reflection package eases demands on associated optics when forming mandatory flat-topped glare-free beams, and 2,000 ...

Plessey is claiming narrow light emission angles direct from lighting LEDs using what it is calling ‘chip-scale optics’. According to the company, schemes to collimate monochromatic light at the LED level have been developed before but no-one has previously collimated white light at the LED level. “The technology was originally designed as an on-chip phosphor dam,” said Plessey’s CTO Dr Keith Strickland. ...