Question I have is are there such lights that will work outside? I have 
dimmers on my porch lights so that's why I am asking.
David Ferrin
Life is what happens after you've already made other plans.
----- Original Message ----- 
From: "Lenny McHugh" <[EMAIL PROTECTED]>
To: "handyman-blind" <[email protected]>
Sent: Saturday, October 11, 2008 9:34 PM
Subject: [BlindHandyMan] Dimmable Compact Fluorescent Lights - Take the 
Pledge: Switch to Energy-Saving Bulbs - Environmental Defense Fund


> When it comes to dimming, compact fluorescents work differently from their
> incandescent cousins. In order for a CF bulb to work in a dimmer, it must 
> be
> specially designed to do so. Be sure to read the package so that you'll 
> know
> if your CF bulb works in dimmer-controlled fixtures. Also, finding where 
> to
> buy dimmable CFs can be particularly difficult, but don't get discouraged.
> Start with our list of dimmable CF bulbs.
>
> Here's another quirk. Unfortunately, even if a CF is designed for dimmers 
> it
> might not work in yours. (The CF packaging spells this out, as well.)
> Sometimes the only way to be sure a bulb will work is to test it. Check 
> the
> store’s return policy and keep your receipt -- or let a friend try the
> energy-saving bulb. But know that there's a bit of trial-and-error 
> involved
> in the process.
>
> One last caveat. Once you've screwed your dimmable CF into your fixture 
> and
> begin test-driving it, you might notice a difference in its dimming range.
> While incandescent bulbs dim smoothly between being completely off to 100
> percent brightness, CF bulbs have a narrower dimming range. Generally,
> dimmable CF bulbs can dim between 20 and 90 percent of full light.
>
> Why CF bulbs are harder to dim than traditional bulbs
> You can dim a traditional incandescent bulb simply by reducing the amount 
> of
> power sent to the bulb. Less power means less heat and less light.
>
> With CF bulbs, dimming is more complicated. Reducing power to a CF bulb 
> can
> keep its filament from getting hot enough to work properly, and the bulb
> simply goes out. Reducing the voltage can dim the light only by 30 to 50
> percent. To achieve better, more consistent dimming, designers must make
> other adjustments.
>
> In all fluorescent bulbs, the ballasts (the bulb's "engine" located inside
> the ceramic between the socket and bulb) are what make them work. The
> ballast both starts the light and keeps it lit.
>
> Early CF bulbs had magnetic ballasts that did not easily lend themselves 
> to
> dimming. When electronic ballasts came on the scene, it was easier to 
> design
> these CFs for dimming. However, as with any new technology, dimmable CF
> bulbs are still being refined. As more companies enter the growing market
> for energy-saving bulbs, the options for dimmable bulbs are expected to
> become wider and more easily available.
>
> It is worth the effort to find a CF for your dimmer—dimmable CF bulbs are
> hands-down more efficient than traditional incandescent bulbs. They use 
> less
> electricity, cause less pollution and last much longer. Plus, when you dim 
> a
> CF bulb, you save even more electricity.
>
> Posted: 12-Oct-2006; Updated: 01-Aug-2007
>
> Source: http://www.edf.org/page.cfm?tagid=631
>
>
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