Tuesday, 30 August 2016

Venture Lighting Europe Illuminates Costco Car Park

Venture Lighting Europe has supplied a custom retrofit gear tray to help a Costco store in Birmingham England reduce its energy consumption. The lighting also helped the store improve the lighting of its underground car park. The company worked with lighting maintenance contractors Solent Lighting to develop a 50W LED retrofit gear tray that can replace 300 150W Metal Halide lamps using the existing fittings. The LED lights consume about 70% less electricity than the lamps that they replace.

Philips Hue announces a $40 motion sensor

Philips Hue is expanding its line up of smart light devices with a motion sensor. This one is pretty straightforward — when you walk in front of the sensor, your Hue lights will turn on. What’s different from other motion sensors? It works on battery, so you can put it anywhere around your home, such as the corner of a hallway, a bathroom or a garage. Philips says the device is supposed to work for two to three years with two AAA batteries. It costs $39.95.

Monday, 29 August 2016

Cree recalls LED T8 Lamps due to burn Hazard

Cree recalls LED T8 Lamps due to the recalled lamps can overheat and melt, posing a burn hazard. The recall involves Cree LED T8 Replacement Lamps, including lamps that were provided as free replacements for a previous recall in June 2015 and new lamps sold since the recall. These lamps are used indoors to replace traditional two-pin T8 fluorescent tubes. The white lamps have a cylindrical shape and measure 48 inches long. “Cree,” “BT848 Series Lamp,” the product number and a four-digit date code are printed on the lamp or on a white label affixed to the lamp.

RGB LEDs: How to Master Gamma and Hue for Perfect Brightness

You would think that there’s nothing to know about RGB LEDs: just buy a (strip of) WS2812s with integrated 24-bit RGB drivers and start shuffling in your data. If you just want to make some shinies, and you don’t care about any sort of accurate color reproduction or consistent brightness, you’re all set.
But if you want to display video, encode data in colors, or just make some pretty art, you might want to think a little bit harder about those RGB values that you’re pushing down the wires. Any LED responds (almost) linearly to pulse-width modulation (PWM), putting out twice as much light when it’s on for twice as long, but the human eye is dramatically nonlinear. You might already know this from the one-LED case, but are you doing it right when you combine red, green, and blue?

Friday, 26 August 2016

Fear of the light: why we need darkness

Due to pervasive light pollution – glare from excessive, misaimed and unshielded night lighting – 80% of Europe and North America no longer experiences real darkness. For anyone living near a major metropolis, a satellite image of the Milky Way seems abstract: we understand it to be a document of something true, but our understanding is purely theoretical. In 1994, after a predawn earthquake cut power to most of Los Angeles, the Griffith Observatory received phone calls from spooked residents asking about “the strange sky”. What those callers were seeing were stars.

Infrared LED revenue growing faster than overall IR components

Increased adoption of biometrics security in mobile phones, close-circuit television and other consumer applications spurred revenue growth in the global market for infrared LEDs from $201.5m in 2014 to $241.4m in 2015, according to Jamie Fox, principal analyst, LEDs and Lighting, at IHS Markit. While infrared LEDs grew 19.8% year-on-year in 2015, the overall infrared components market fell by 9%. Osram, Everlight and Vishay were the leading suppliers.

Thursday, 25 August 2016

City moves ahead with plan to convert streetlights to LED

Nine months ago, the city abruptly tabled its plan to convert Oahu's street lights to more environmentally-friendly LEDs because of contract issues. Now, it's moving forward with the project to replace some 53,500 sodium lights. Robert Kroning, director of the city Department of Design and Construction, said he thinks residents will notice a significant improvement when LEDs light up the night.