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Compact Fluorescent lamps are becoming very popular for household use and is fast replacing the typical screw based incandescent lamps. The main reason of their popularity is that they use one third of the energy of incandescent lamps and deliver the same amount of light.

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Wall mounted Passive Infrared PIR motion sensor LED lights and energy saving lamps for outdoor and garden areas.

Earlier today I received an email from the office of Pittsburgh city councilman Bill Peduto announcing an ambitious plan that will reduce Pittsburgh's carbon footprint while saving the city millions in electricity costs. Peduto, who has been the only city legislator to propose green legislation of any sort over the last few years, wants the city to convert all 40,000 of its street lamps to energy efficient LED lighting. The cost of the program will be around $24 million and will be paid using a combination of the annual costs savings and funding from the state's Guaranteed Energy Savings Agreement. Pittsburgh would join cities such as Austin, Raleigh (home LED manufacturer CREE), and Toronto as major cities who have adopted LED lighting on a large scale. According to Peduto, Pittsburgh would be the largest city in the US to roll out a complete conversion to LED lighting. This would be great news for Pittsburgh's green agenda, especially in light of today's Pittsburgh Penguin's press conference, where they announced the 21 year naming rights deal for their new arena, which will be known as the Clean Coal Center.

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Steinel German quality fine movement PIR occupancy sensor and presence detector for Classroom, Staff room and Study hall

Ceiling mount 360° ultrasonic motion detector and PIR motion sensor for car parking area and garage lighting control

Steinel German quality 230v 50Hz PIR occupancy sensor and presence detector for Laboratory and R&D centre

PIR motion sensor, occupancy sensor, presence detector, 230v PIR motion detector for energy saving and lighting automation in indoor and outdoor areas of hotel, school, warehouse, office building, car parking areas. Pammvi is dealer of german quality steinel brand PIR motion sensor, occupancy sensor, presence detector, LED lights in India.

Ceiling mount PIR motion sensor and wall mount ultrasonic motion sensor light for toilets, bathrooms, WC, washrooms and restroom.

Ceiling mount PIR motion sensor and wall mount ultrasonic motion sensor light for toilets, bathrooms, WC, washrooms and restroom

Photocell lux detector for exterior street lighting for automatic lighting control and energy savings.

Steinel German quality 230v 50Hz 180° outdoor wall mount PIR motion sensor halogen light for security and surveillance of private, commercial and industrial buildings.

360 degree 230v Steinel PIR motion sensor & ultrasonic motion detector for Toilet, WC, Bathrooms, Restroom, Cloakroom, Car Parking Areas, Garage

Low cost PIR motion sensor, motion detector lighting, PIR motion sensor LED light in India by Pammvi

Here's one for the alternative wind power experiments file - a report from BusinessWeek on an interesting design idea, inspired by the Tacoma Narrows Bridge collapse of 1940 - Humdinger's Wind Power Alternative. As an MIT engineering undergraduate visiting the rural fishing village of Petite Anse, Haiti, in 2004, Shawn Frayne hoped to devise a way to convert abundant agricultural waste into cheap fuel. But the budding engineer soon found that the community's mainly poor residents faced an altogether more immediate need. Unconnected to the local power grid, they relied heavily on dirty kerosene lamps, which are not only costly to operate but also unhealthy and dangerous. He decided to devise an alternative-a small, safe, and renewable power generator that could be used to power LED lights and small household electronics, such as radios.

A light emitting diode (LED) is an III-V semiconductor device that can convert electrical energy into visible light, a phenomenon called electroluminescence (EL). In recent years, labs have been fine-tuning this device to the point now that it is used with ever more frequency in the manufacture of auto lamps.

Working in Haiti, Shawn Frayne, a 28-year-old inventor based in Mountain View, Calif., saw the need for small-scale wind power to juice LED lamps and radios in the homes of the poor. Conventional wind turbines don't scale down well-there's too much friction in the gearbox and other components. "With rotary power, there's nothing out there that generates under 50 watts," Frayne says. So he took a new tack, studying the way vibrations caused by the wind led to the collapse in 1940 of Washington's Tacoma Narrows Bridge (aka Galloping Gertie).