Environment

Use a 2 Liter Bottle as a 50 Watt Bulb

A water-filled 2-liter bottle can replace a 50 watt light bulb. Used across Asia and South America. http://bit.ly/bAPUpt

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Energy

Switch to LED Lightbulbs

A new 10 watt LED lightbulb from Philips produces as much light as a 60 watt incandescent bulb. A Time Magazine "invention of the year" 2009. http://bit.ly/5G6LHU

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Environment

Replace Your 60 Watt Bulbs

New excellent replacements for traditional 60 watt bulbs are coming on the market from Philips and Sylvania. They use 1/5 the energy, are brighter, dimmable, and last 12 times longer. CNET http://bit.ly/aKUl1K

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Global Development

New Solar Light Bulb to Replace Kerosene Lamps

A new solar lightbulb can shine for two hours after a day of charging. Costing $15, it pays for itself quickly. http://bit.ly/9xzweE

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Energy

Eliminate Kerosene

$36 billion is spent annually on kerosene for lighting. Cheap, solar-powered lights are changing that. Economist http://econ.st/RuWA4M

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Global Development

Inflatable Solar Lights

MPOWERD Luci lights are solar powered, inflatable, cheap -- and catching on in developing countries. https://www.mpowerd.com/

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Global Development

Gravity-powered LED

In a novel approach to addressing lack of reliable lights in developing countries, the GravityLight is powered for 30 minutes by a descending 22 pound weight. Popular Science Innovation 2013. http://bit.ly/1lv2XAy

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Environment

Streetlights Change Brightness Depending on Moon

Lunar Resonant Street Lamps sense the brightness of the moon and adjust streetlights accordingly, saving energy. A Metropolis Magazine winning idea 2007.http://bit.ly/828PQR

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Transportation

Wiki Traffic Light

Will more people sit quietly at a red light if you provide user-generated fun fact? Finalist idea in The Fun Theory contest http://bit.ly/9aTVnY

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Technology

Audio Bulbs

Combination lightbulbs / wifi speakers help wire sound in a house quickly. David Pogue idea of year 2011 http://nyti.ms/vJi40E

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Energy

Lease solar chargers

British firm Eight19 provides solar charges in developing countries which are paid off month by month via cell phone. Economist http://econ.st/z8bnGL

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Security

Networked Lighting

New LED technologies combine surveillance cameras and networked communications to allow total environmental awareness. NY Times http://nyti.ms/1bIzogi

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