LEDs/Lighting

Subscribe to this RSS Feed

Ohmite Manufacturing, Arlington Heights, IL, introduces a new line of heat sinks for single LED power modules. The SV300 Series is composed of high performance, low cost, scalable heat sinks designed to accommodate a single LED. Ideal for use with LEDs in medical industry applications, these high aspect ratio devices are available in two standard lengths, 14mm and 25mm, with a 9.9mm mounting surface. Customizable options for this series include length, surface finish, mounting holes, and custom machining.
Read More >>

TandD Corporation, Saratoga Springs, NY, has introduced the RTR-574-H, a Wireless 4 Channel Logger that monitors illuminance, ultraviolet, temperature, and humidity, and achieves a temperature measurement accuracy of ±0.3°C (between 10° to 40°C) with an overall range of -30° to 80°C. The humidity measurement accuracy is ±2.5% (at 25°C, 10 to 85% RH) with an overall range of 0 to 99% RH.
Read More >>

Experiments could aid development of accurate CRI for LED light sources.

Solid-state lighting (SSL) is increasingly being introduced into the market and it is expected that many of the light sources currently used for general illumination will be replaced by light-emitting diodes (LEDs) in the future. As the spectra of LED sources are dissimilar to traditional incandescent and discharge lamps, some of the existing standards and measurement methods are insufficient or deficient when applied to LEDs. For example, a new metric for color rendering of light sources is being developed to address the problems of the color rendering index (CRI) for LED light sources. Such studies require well-designed vision experiments.
Read More >>

New technology combines the benefits of a LED and a laser.

InfiniLED’s latest MicroLEDs (μLEDs) have produced record optical beam intensity. This new device is capable of producing up to 1mW of light from a single 20μm pixel at 405nm. This is equivalent to a light output density of more than 300 W/cm2 — the high cm2 est recorded for a commercially available LED type device.
Read More >>

Record-setting “optical phased arrays” could lead to better laser rangefinders, smaller medical-imaging devices and even holographic TVs.

If you want to create a moving light source, you have a few possibilities. One is to mount a light emitter in some kind of mechanical housing — the approach used in, for example, theatrical spotlights, which stage hands swivel and tilt to track performers. Another possibility, however, is to create an array of light emitters and vary their “phase” — the alignment of the light waves they produce. The out-of-phase light waves interfere with one another, reinforcing each other in some directions but annihilating each other in others. The result is a light source that doesn’t move, but can project a beam in any direction.
Read More >>

As specifiers and end users began moving away from incandescent lighting three decades ago, they started utilizing high intensity discharge (HID) and compact fluorescent (CFL) lamps and fixtures for most commercial lighting applications. The inherent characteristics of these light sources prevents them from generating effective lighting in the desired areas, which creates wasted energy due to much of the light getting trapped inside the fixture.
Read More >>

A successful LED system design must be able to transfer the active device’s heat efficiently from its own PN junction to the ambient. This path includes the printed circuit board on which the LED is mounted and the enclosure and/or heatsink. The designer must confirm that housings and shrouds participate efficiently in maintaining a good operating temperature.
Read More >>

Light emitting diodes (LEDs) are known for their energy efficiency and durability, but the bluish, cold light of current white LEDs has precluded their widespread use for indoor lighting. Now, University of Georgia scientists have fabricated what is thought to be the world's first LED that emits warm white light using a single light emitting material, or phosphor, with a single emitting center for illumination.
Read More >>

Newspapers are filled with stories describing reductions and removal of street lighting in order to reduce municipal costs. Tackling the tricky questions of when and where to install roadway illumination is a challenge for transportation agencies.
Read More >>

To provide significant energy savings with optimal lighting quality, JetBlue Airways recently selected MaxLite’s High- Max® High Output compact fluorescent (CFL) lamps for a series of retrofit projects in its Orlando-based hangar and training center. With maintained lumens and crisp color rendering throughout the bulbs’ long 10,000-hour lifetime, MaxLite’s HighMax CFLs were a good match for JetBlue’s retrofit highwattage applications. The self-ballasted lamps are constructed with a large, solid aluminum heat sink for cool operation and high-heat fluorescent U-bend tubes for optimized strength and longevity. The higher wattage models have an on-board internal cooling fan that helps maintain lumen output, color rendering, and reduced wattage consumption.
Read More >>

GE Lighting LED solutions were recently installed in several locations at Marriott International’s headquarters located in Bethesda, Md. The installations have enriched lighting quality, heightened employee security and improved energy efficiency. Following its corporate campus-wide lighting update, Marriott will use 860,000 fewer kilowatt hours (kWhs) of electricity and save more than $120,000 in combined energy and maintenance costs a year.
Read More >>

Hoffman Performance Lighting has introduced the firstever PAR64 LED Landing Light, a drop-in replacement for existing Q4559 and Q4559X quartz halogen lamps. The ruggedized PAR64 can be used on a wide range of commercial, civil, law enforcement, aero-medical, and military aircraft. With FAA approval pending, this new landing light technology meets or exceeds all FAA and MIL specifications and is fully qualified to RTCA DO160, MILSTD- 810, MIL-STD-461, and other requirements for both fixed-wing and rotor-craft applications.
Read More >>

Everlight Electronics (Carrollton, TX) has introduced a new highly efficient white mid-power LED series 62-227B (0.4W) and 62-217B (0.5W). These top view LEDs (5630 package) provide high efficacy, high CRI (min. 80 or min. 75), low power consumption, a high luminous flux output, high current capability, a wide viewing angle, and a compact form factor. The design of Everlight’s 0.5W 62-217B LED provides a high lumen, high quality light solution for mid-power applications . Measuring 5.6mm × 3.0mm × 0.9mm (LxWxH), the 62-217B Mid-Power LED is available in 13 versions in warm white (2700-3000K), neutral white (4000K), and cold white (5700-6500K) with typical luminous fluxes ranging from 40lm to 60lm.
Read More >>

Power Integrations (San Jose, CA) recently announced two new reference designs describing high-efficiency, non-isolated, high-power-factor (PF) LED drivers for T8 tubes. The designs feature low component count and leverage simple magnetics and single-sided boards yielding power densities of 14.2 W/in³. Based on the LNK460KG LED driver from Power Integrations’ LinkSwitch-PL family of ICs, the circuits detailed in DER-337 (high-line) and DER-345 (low-line) use single-stage non-isolated topologies which result in a profile of only 8 mm - small enough to be mounted behind the LEDs in the T8 tube.
Read More >>

Universal’s (Nashville, TN) new family of Signa® LED chains makes it simple to design signage with high lumens, consistent color, superior reliability, and an installer-friendly module fastening system. Offering high-efficiency 80- and 100-lumens-perfoot options, these new LED chains allow you to maximize the number of feet of letter channeling per single 60W power supply while still providing high lumen performance. Universal also offers 60W 12-volt Class 2 LED drivers to power these LEDs in a variety of applications. The RoHS-compliant LED chain also features a wide operation temperature range of -40°C to +60°C.
Read More >>

EnvironmentalLights.com (San Diego, CA) recently launched a new family of individually addressable RGB LED pixel lighting called Pixel- Pro LED lighting that combines the ability to produce millions of colors with the technology needed to achieve individual pixel control. PixelPro LED modules combine RGB LEDs with an intelligent WS2801 integrated circuit (IC) chip to produce eye-catching animated effects. With one IC chip per module, and one IC chip per LED on the strip lights, the performance and control of the modules is unprecedented. The modules come in a choice of 5 configurations: square, bullet, circular, dome, or strip. They also come in waterproof or non-waterproof configurations.
Read More >>

Aimtec (Vaudreuil-Dorion, Canada) recently introduced its AMEPR30D-5070AZ-220 AC/DC LED driver with triac dimming. Available in constant output currents ranging from 0.2 to 2.0A, the AMEPR10D-AZ (10 watt), AMEPR15D-AZ (15 watt), and AMEPR30D-AZ (30 watt) drivers come in one of the industry’s smallest form factors of 133mm x 33mm x 30mm in an IP20 or IP67 rated case for easy integration into a multitude of indoor and outdoor applications.
Read More >>

Green Watt Power (Concord, CA), a division of Calex Mfg. Co., has announced CSA/UL agency approvals on the Green Watt Power offering of LED Constant Current power supplies. The GLC Series offers solutions from 18 Watts to 150 Watts. All GLC models are enclosed to IP67 standards and well suited for virtually all LED lighting applications including indoor, outdoor, signage, and thermally harsh and damp environments. All models have a universal AC input and are agency approved to 277 VAC. Agency approvals include UL/CSA 8750 and 1310 class 2 or 1. All GLC models feature over voltage, over current, over temperature protection and are RoHS compliant. All models are designed and built for consistent performance and high reliability and come with a Five Year Warranty.
Read More >>

N2Power (Simi Valley, CA) a division of Qualstar Corporation, has announced constant current versions of its 375W AC-DC power supply dubbed XL375LED. The new units are designed to drive strings of LEDs in high power lamps for industrial, entertainment and outdoor lighting requirements.
Read More >>

Texas Instruments Incorporated (TI) (Dallas, TX) recently introduced a 1.5A constant current DC/DC buck converter with a combination of frequency synchronization, pulsewidth modulation (PWM) dimming and thermal foldback. The TPS92510 features a wide 3.5V to 60V input voltage operating range and integrated MOSFET. Together with TI's WEBENCH® LED Architect, the lighting developer can quickly design a power management circuit to drive a string of up to 17 high-brightness LEDs at up to 97-percent power efficiency in automotive, industrial and general illumination applications.
Read More >>

iWatt (Campbell, CA) has launched its iW3616 (12W) and iW3617 (25W) LED driver ICs based on the company’s thirdgeneration digital AC/DC SSL (solid state lighting) LED driver platform. The drivers are designed for 120V/230VAC offline LED lighting bulbs and fixtures.
Read More >>

O2Micro International Limited (Santa Clara, CA) recently extended the company's Free Dimming™ technology and lighting product portfolio with the introduction of the OZ8024 and OZ8024R LED Driver Controllers. Free Dimming technology enables LED bulbs to dim using any on/off switch, thus eliminating cost, installation and compatibility issues associated with traditional incandescent dimmers. O2Micro’s patented Free Dimming technology works with any on/off switch, including wall toggles, paddle switches, pull cords, rotary switches and other types of on/off switches commonly found on walls, extension cords and table/desk lamps.
Read More >>

Planar lighting pioneer Oree (Ramat Gan, Israel)recently unveiled the LightCell™ Plus to give lighting fixture manufacturers more options for developing innovative LED-based planar light fixtures. LightCell Plus is geared to general lighting segments including offices, retail, hospitality and residential lighting.
Read More >>

Master Bond UV15 (Hackensack, NJ) is widely used for a variety of bonding, coating and sealing applications in the optical, electronic and optoelectronic industries. This epoxy based UV curable system is 100% reactive and does not contain any solvents or other volatiles. It is also completely free of any oxygen inhibition.
Read More >>

ON Semiconductor (Phoenix, AZ) has introduced the new NSIC20xx series of linear constant current regulators (CCR) designed for use in solid state lighting systems. The new NSIC20XX series of CCRs offer a maximum voltage rating of 120 Volts, 3 Watts, and are capable of withstanding the high peak voltages of alternating current off-line HBLED lighting applications, including digital signage systems, lighting panels and decorative illumination. These new CCRs protect against the sudden surges that are commonplace in such lighting applications. Based on selfbiased transistor (SBT) technology, the NSIC20XX series of devices are capable of current regulation over a very wide voltage range, while their negative temperature coefficient helps to protect the LEDs from thermal runaway at extreme voltage and current levels.
Read More >>