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n:vision 23W (100W equivalent) compact fluorescent
New bill would mandate that light bulbs produce 120 lumens per watt by 2020

It looks as though energy efficiency is still a big priority for municipalities and countries across the globe. We've already detailed energy-efficient LED lighting efforts put forth by Raleigh, NC. We've also discussed how Australia and the European Union (EU) plan to get rid of incandescent light bulbs by 2009. The United States is also moving towards ushering out inefficient lighting with H.R. 1547, which was published on March 15, 2007.

The bill (PDF), which was submitted by California representative Jane Harman, indicates that light bulbs which have an overall luminous efficacy of 60 lumens per watt (lm/W) will be prohibited by January 1, 2012. The energy requirements get progressively steeper every four years. On January 1, 2016, the requirement will grow to 90 lm/W and will reach 120 lm/W by 2020.

A traditional 100W tungsten incandescent light has an overall luminous efficacy of 17.5 lm/W. A 23W compact fluorescent (100W equivalent) has an overall luminous efficacy of 60 lm/W.

Exemptions could be made by the Secretary of Energy for certain applications where it wouldn't be feasible to use energy-efficient lighting. These include applications related to military, medical or matters of public safety.

If an exception is made by the Secretary of Energy, that still doesn't give entitle the recipient to a free pass to continue using outdated technology. The exemption will only be in effect for two years after which the current enacted requirement will have to be adhered to.

The bill also notes that consumers and businesses will be given incentives to encourage the use of energy efficient light bulbs.

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By Mitch101 on 3/22/2007 2:58:32 PM , Rating: 3
I was thinking recessed 12v lighting with a single solar panel on the roof should collect enough solar energy to power all the lights in my home providing it didnt have to go through the whole DC-AC transformation. I would put up one nice solar panel to have free lighting. They should be able to do it after all they have those driveway lights that are solar panels and small solar panels in usually not direct sunlight do pretty good. When the 12v battery is filled you could then start doing DC-AC conversions selling the electric back to the grid or powering your 120VAC items if you choose.

The problems lie in the solar panels taking energy and doing the whole DC-AC conversion when we should be designing items that would work with the DC power supplied by solar panels collected at a battery point.

My 12V spec was taking FREE energy from sources like wind and sun into the home. Not getting it from the electrical companies 120vac and converting it to 12V.

I also read some time ago about a guy who ran fibre optics through his house and how a single light was lighting all the rooms in his home. Cool but impractical if you wanted to make changes to the home.

If using a source like solar then LED's might be the most practical light sources.

By Fritzr on 3/23/2007 5:24:34 AM , Rating: 3
12v DC appliances are readily available. Original purpose was to allow them to be powered from an automobile cigarette lighter. Solar systems standardized on 12v DC to take advantage of this existing tech base.

A fully solar electric home would use 12v appliances & lighting. A battery room stores excess power and supplies it to the house grid when the demand is above production.

Check back issues of Mother Earth news at to see examples of this in practice. There have been many other publications of this tech, Mother was simply easy to find while I was typing this :)

Here is the url for a quick search of the articles for "Solar Power"

By frobizzle on 3/23/2007 8:17:58 AM , Rating: 1
A fully solar electric home would use 12v appliances & lighting. A battery room stores excess power and supplies it to the house grid when the demand is above production.

A battery room? Let's all hope the batteries are not manufactured by Sony!

(Let the mod downs begin!)

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