Entries with tag led lights.

Networked Lighting Systems Vulnerable to Attack

A UK-based security firm found a vulnerability in a Wi-Fi enabled LED light bulb that lets hackers control the lights and gain network information. Context Information Security found a way to access a “master bulb” in a mesh network of LIFX lights—Wi-Fi-enabled, multicolor, energy-efficient LED bulbs that users can control via their smartphones. This enabled the company’s researchers to control all the bulbs in the system and expose network-configuration details. LIFX Labs has patched the problem, issued a firmware update, and added encryption to its systems. Context issued a detailed description of the exploit on its website (contextis.co.uk/blog/hacking-internet-connected-light-bulbs). The firm says this work was part of its ongoing research designed to show that security is not a high priority for many of the devices built to become part of the Internet of Things. The company has already found vulnerable computer printers, baby monitors, and children’s toys. (SlashDot)(Context @ RealWire)(Context)

Samsung Announces Bluetooth-Controlled Smart Bulb

A new Samsung LED light bulb lets users control its intensity and color via Bluetooth from mobile devices. The Smart Bulb is controlled by a mobile application that lets users configure as many as 64 LEDs simultaneously. Samsung says because the technology uses Bluetooth rather than Wi-Fi, it doesn’t need other equipment such as a wireless bridge or access point. The Smart Bulb has a 15,000-hour average lifespan, compared to 25,000 hours for conventional LED bulbs, according to Samsung. The company hasn’t announced the product’s pricing and availability yet. (Daily Tech)(Tech Crunch)(Samsung Electronics Official Global Blog)

Researchers Create Silicon-Based LEDs

Scientists from Karlsruhe Institute of Technology and the University of Toronto report that they have made silicon-based LEDs using silicon nanocrystals that are able to emit various colors of light. These LEDs are free of heavy metals, which means the devices are not toxic. To date, scientists have been able to make silicon-based LEDs that emit only red light. The ability to produce LEDs capable of multicolored displays “is an absolutely novelty,” said Florian Maier-Flaig, a doctoral student at the Karlsruhe School of Optics and Photonics. The new system adjusts the color of light by separating the nanoparticles in the LED based on size, which helps their operational stability. Using multiple sizes of nanoparticles together typically triggers short circuits, but because the devices use a uniform size of nanoparticles, this technique also increases operational life. The researchers published their work in the journal Nano Letters. (PhysOrg)(Karlsruhe Institute of Technology)(Nano Letters)

Artist Uses San Francisco’s Bay Bridge as Canvas for Digital Display

Leo Villareal, a New York-based artist well known for his computer-based LED art installations, is putting the final touches on The Bay Lights, an art project that will use 25,000 individually addressable, white LED lights to illuminate the San Francisco-Oakland Bay Bridge’s western span. Villareal recently tested the lights, which the California Department of Transportation installed on the north-facing side of the suspension bridge. Villareal is using algorithms installed on a laptop wirelessly connected to the bridge to control the lights. “This has never been done before, literally debugging software 500 feet in the air in front of a million people,” stated Ben Davis, the project’s director, who said installation and testing is almost complete. The algorithms, according to The Bay Lights, are being based on patterns related to weather, water, traffic of cars ans ships, as well as area wildlife. The patterns will not repeat. Donations to the project—slated to debut on 5 March 2013—now total $5.8 million with an additional $2.2 million required for full funding through 2015. (SlashDot)(Xconomy)(The Bay Lights)

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