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Nov 6, 2024 · LEDs Magazine covers technology advances, markets, and applications of LED lighting and related component systems for commercial development and deployment by researchers, engineers, product developers, and manufacturing professionals
What is an LED? - LEDs Magazine
Sep 1, 2004 · In the simplest terms, a light-emitting diode (LED) is a semiconductor device that emits light when an electric current is passed through it. Light is produced when the particles that carry the current (known as electrons and holes) combine together within the semiconductor material. Since light is generated within the solid semiconductor ...
Running LEDs from an AC supply
May 2, 2006 · To run an LED-based fixture from a mains supply (e.g. 120 V AC) requires electronics between the supply and the devices themselves to provide a DC voltage (e.g. 12 V DC) capable of driving several LEDs. A new approach is to develop AC-LEDs, which can operate directly from an AC power supply. This provides several advantages, as Bob Kottrisch of ...
PoE technology for LED lighting delivers benefits beyond efficiency
Sep 3, 2015 · Assuming a dimmable LED fixture, the AC system efficiency (82.9%) is only slightly better than the 10W PoE LED fixture with the maximum 100m cable length (82.3% efficiency). If we consider the 25m Cat5 cable, the AC efficiency is actually decreased by 1% (82.9% vs. 83.9% for the PoE LED lamp).
Technology roadmap shows UV-C LEDs are on the rise - LEDs …
Jul 24, 2020 · Market analysts, even prior to COVID-19, predicted a UV LED market exceeding $1 billion in a few years, to be compared with the lighting LED market, which was $5.8 billion in 2019, after growing for many years now. In addition, large LED players, including Nichia and San’an, are notably investing in the UV-C LED market, no doubt in ...
Controlling LED lighting systems: introducing the LED driver
Dec 10, 2004 · Most LED drivers are compatible with commercially available 0-10V control devices and systems such as occupancy sensors, photocells, wallbox dimmers, remote controls, architectural and theatrical controls, and building and lighting automation systems. LEDs can also work with devices governed by the DMX and digital addressable lighting interface ...
5 Tips to use Recessed Downlights for Perfect Layout
Apr 19, 2019 · The general consensus for selecting the number of downlights required is as follows: Step 1 – Measure the square footage of the room by multiplying its width by its depth. Step 2 – Multiply this square footage by 1.5. This will give you a guideline for the total wattage required to light the space. By way of an example, if your kitchen is ...
Seoul Semiconductor moves to emphasize CSP LEDs across SSL …
Sep 15, 2021 · Seoul Semiconductor moves to emphasize CSP LEDs across SSL applications. The company’s WICOP technology is finding broad uses in automotive applications, and Seoul said it will ultimately have WICOP-based, SunLike-spectra LEDs. Seoul Semiconductor is placing WICOP LEDs into traditional high-power packages for demanding applications such as ...
LED-based products must meet photobiological safety standards: …
Nov. 29, 2011. The potentially complex procedure of evaluating LED photobiological safety is now a legal requirement in Europe, but few countries have yet followed the European mandatory-testing lead. LESLIE LYONS discusses the implementation of the IEC62471 standard after an in-depth look at the measurement of radiance and irradiance.
Understand how to measure luminous flux and radiant power …
Oct 21, 2016 · In this excerpt from an upcoming reference book entitled Handbook of LED and SSL Metrology, GÜNTHER LESCHHORN and RICHARD YOUNG explain the fundamentals behind luminous flux and radiant power measurements - a task critical in solid-state lighting (SSL) product development. Typically luminous flux and radiant power are the most important optical parameters for LEDs although the spatial ...