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What are the most energy efficent light bulbs? how to be more eco-friendly around the house?

I picked up my first ever issue of Mother Earth News and I absolutely loved it. What are some small things I could do to help save the planet?

DIY Dave7 years ago
LEDs
frollard7 years ago
http://www.megavolt.co.il/Tips_and_info/bulbs_at_glance.html

they have the efficiency in lumens/watt and a description of each type.

'low pressure sodium' are most efficient, but put out yellow light.

led are in the middle - putting out 'whatever' colour
rickharris7 years ago
Low energy CFL compact florescent lamps will use least electricity for useful light or for decorative lights LEDS use very little energy.