LED backers have long advocated solid-state lighting because it consumes one-tenth the power of incandescent bulbs and lasts longer. But the high price tag has meant that LEDs are mainly used for commercial applications.Because there is concern that manufacturers will overstate the efficiency benefits or light output, the Department of Energy has set up a "Lighting Facts" Web site and label to guide consumers. Lighting Facts lists the Pharox bulb bulb among those that perform as claimed.
Canada to help a team of 600 students send an LED illuminated message to the International Space Station as it passes overhead. On September 19th, 2009, in the dark of night, the students gathered in a remote field to send their message to the International Space Station as it passed over Calgary, 300 km (186 miles) above the earth’s surface.
Bob Thirsk, a Canadian astronaut and Schulich School of Engineering graduate, is on a six-month mission with the International Space Station. Using the LED lights provided by Osram, students communicated with Thirsk via their light message to express their support for him and his crewmates on their voyage. Using Osram’s donation of 300 units (boards), each containing 4 new led high bay light, the students delivered their message with an estimated total brightness of 400 lumens per board = ~120,000 lumens. Each board uses two 9V batteries and contains a simple switch allowing the students to manually flash the LEDS to send a signal to the space station.
Canada to help a team of 600 students send an LED illuminated message to the International Space Station as it passes overhead. On September 19th, 2009, in the dark of night, the students gathered in a remote field to send their message to the International Space Station as it passed over Calgary, 300 km (186 miles) above the earth’s surface.
Bob Thirsk, a Canadian astronaut and Schulich School of Engineering graduate, is on a six-month mission with the International Space Station. Using the LED lights provided by Osram, students communicated with Thirsk via their light message to express their support for him and his crewmates on their voyage. Using Osram’s donation of 300 units (boards), each containing 4 new led high bay light, the students delivered their message with an estimated total brightness of 400 lumens per board = ~120,000 lumens. Each board uses two 9V batteries and contains a simple switch allowing the students to manually flash the LEDS to send a signal to the space station.
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