28 Jul '12, 4pm

Which medium base LEDs can be used in enclosed ceiling fixtures? Most require an open fixture.

I often refer to incandescent bulbs as “toasters” (here and here ) because of the amount of waste heat they make and the similar ways the filaments in the two electrical appliances work. And one sign of the higher efficiency of CFLs is that they aren’t as hot to the touch. If LEDs are at least as energy-efficient as CFLs, why then is there so much concern over their heat and ventilation ? Higher efficiency should mean less waste heat. LEDs and heat The answer is that LEDs do indeed make less heat; however, they themselves are more sensitive to heat than their incandescent and fluorescent brethren. (Fluorescents work the opposite way; they are sensitive to cold.) As a result of this sensitivity, a major focus of the design of LEDs has been on heat dissipation. That’s why you’ll often see lots of little metal fins on LED replacement bulbs. Those fins help cool the LEDs. And ...

Full article: http://greenhomeguide.com/askapro/question/which-medium-b...

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EcoFriendlyBuilder Guest Post: A Modern City With LEDs #Energy #EnergyEfficiency

EcoFriendlyBuilder Guest Post: A Modern City Wi...

greenbuildingelements.com 30 Jul '12, 3pm

The LED lighting revolution has stepped out of the home and made its way to the streets as more cities across the globe ar...

LEDs score gold at Olympics: via @ednmagazine

LEDs score gold at Olympics: via @ednmagazine

edn.com 30 Jul '12, 6pm

Much of the work was in play well before the Olympics torch was passed. The International Exhibition & Convention Centre s...

The West in flames: Get used to it

The West in flames: Get used to it

grist.org 27 Jul '12, 11am

This year’s Whitewater Baldy Complex fire in New Mexico is the largest in the state’s history. (Photo by Gila National For...