In order to determine the robustness of this continuously growing class of lighting devices we arranged an experiment of accelerated aging: the four groups of LEDs (from different manufacturers) were submitted to a series of stress tests in environmental chambers with set-point temperatures ranging from 45 °C to 105 °C, in accordance to the IES LM-80-08 lumaintenanceance measurement standard.
Both groups of LED (the constricted tube type and the bulged shaft type) use the similar fundamental concept of retaining the resistive force by plastically expelling the lead through an orifice created by the annular restriction.
Earlier in Guayaquil, 165 miles southwest of the capital, a group of leftist-led unions, student organizations and neighborhood associations seized the provincial government building.
In St Albans, where a group of nurse-led clinics have been using acupuncture since 2008 for patients with knee osteoarthritis, economics have been put under scrutiny.
According to accounts from American officials, the episode started when Taliban fighters from Pakistan crossed about 200 yards into Afghanistan's Kunar Province and attacked a group of American-led troops with small-caliber weapons and rocket-propelled grenade fire.
The circumstances were nearly identical: a group of Tutsi-led rebels, widely believed to be backed by Rwanda, eviscerating a feckless, alcoholic government army that didn't even bother to scoop up its dead.
A pre-screened group of minority-led tech start-ups are invited to introduce their companies to the NAA Angels.
ISTANBUL/BEIRUT (Reuters) - Turkish jets pounded a U.S.-backed group of Kurdish-led militia fighters in northern Syria with more than 20 air strikes overnight, highlighting the conflicting agendas of the two NATO allies in an increasingly complex battlefield.
As Track 3 tasks were being analyzed and designed by CTD staff, a group of NCBI-led collaborators were concurrently and coincidentally working on the development of BioC, a common interchange format to represent, store and exchange data in a simple manner between different language processing systems and text-mining tools (19).
A group of Tea Party-led Republicans said America had to cut its debt.
