Design Con 2015
Breaking News
Design How-To

How compact fluorescent lamps work--and how to dim them

NO RATINGS
More Related Links
View Comments: Oldest First | Newest First | Threaded View
Page 1 / 2   >   >>
Techmush
User Rank
Rookie
re: How compact fluorescent lamps work--and how to dim them
Techmush   3/11/2009 7:46:56 AM
NO RATINGS
The temperatures of the incandescent lamp can not be correct.It is more like 2800 K.

mikeS
User Rank
Rookie
re: How compact fluorescent lamps work--and how to dim them
mikeS   3/13/2009 3:18:12 AM
NO RATINGS
I have to note I bought some three way CFL bulbs from GE a few years ago. They must have the stupidest engineers/testers/marketers. Instead of the normal low/medium/high of an incandescent bulb it goes low/high/medium.

billp37
User Rank
Rookie
re: How compact fluorescent lamps work--and how to dim them
billp37   7/3/2009 1:53:18 PM
NO RATINGS
KNME distributed free cfls at the Magdelena Ridge Observatory, NM on Saturday June 27, 2009. See practical comparison of cfl and incandescent photographed performance. http://home.comcast.net/~bpayne37/whitman59/whitman59after.htm#cfl

starbrd
User Rank
Rookie
re: How compact fluorescent lamps work--and how to dim them
starbrd   12/8/2011 1:54:50 AM
NO RATINGS
Tom does not mention the 120VAC input to the CFL. Current distortion is around 114% TDD, just a current spike. Power factor is 0.61. I cannot wait until all of Washington DC is on CFLs, electronic ballasts, computer switching power supplys and VFDs.

Some Guy
User Rank
Manager
re: How compact fluorescent lamps work--and how to dim them
Some Guy   2/21/2013 8:08:44 PM
NO RATINGS
Just use LED bulbs: 12.5W, lower TCO, 22.8 years, 2700K color temperature, no hazardous disposal, not subject to price hikes from China cornering the rare earth phosphors market, and, oh yeah, dimmable. I really like the DOE prize wining Philips AmbientLED lights at Home Depot or Amazon.

Battar
User Rank
Rookie
re: How compact fluorescent lamps work--and how to dim them
Battar   2/24/2013 11:00:07 AM
NO RATINGS
I've never used dimmers, not even for incandescent lamps (I only use CFLs now). I've never found the dimming function necessary. I should think that 99% of all light fixtures are not connected to dimmers, so this is a niche market.

CC VanDorne
User Rank
CEO
re: How compact fluorescent lamps work--and how to dim them
CC VanDorne   2/25/2013 8:11:56 PM
NO RATINGS
Nah, we are out there. I love dimmers. I use them constantly to adjust ambient light depending on my need or mood. For this reason I still prefer incandescents and it really bothers me that some nanny-staters can limit my choices. That should bother you all too, much more than poor efficiency.

Al_
User Rank
Rookie
re: How compact fluorescent lamps work--and how to dim them
Al_   3/19/2013 7:03:39 PM
NO RATINGS
Um... you're confused... at 2800K, stainless steel is melted (almost at the boiling point of iron, actually). That's pretty hot. You're thinking of Correlated Color Temperature. When people say that the light is 2800K or 5600K daylight or standard D65 or 6500K daylight, they are saying that the light's color is the same hue as that of an ideal black body radiator at that temperature. The "black body curve" on the standard CIE 1932 color charts that you commonly see is the hue that you get from a black body radiator at those temperatures... not the actual temperature of the light source you're describing. Your monitor is usually peaked up to something like 9500K by default. That certainly doesn't mean that it's actual temp is 9500K... it would burn through your desk just before it explodes into a gaseous mess at that temp! ;-)

Al_
User Rank
Rookie
re: How compact fluorescent lamps work--and how to dim them
Al_   3/19/2013 7:09:57 PM
NO RATINGS
Of course, I still think their spiky spectrum stinks. This usually translates into a poor CRI (Color Rendering Index) - although lately the CRI's seem to be getting better, but I'm not seeing the correlation to good, even, spread spectrum light like incandescents or tungsten, etc... Stuff with spiky phosphors to achieve a color temperature always look crappy to me. It's not just the color of the light - it's how well it emits all the wavelengths and how smooth that emission is... Most LED lights make skin color look awful. Have your wife dress in LED lights, and then go outside and see if she still thinks the colors coordinate. It's not your (or her) imagination. There is science in there that explains it.

old account Frank Eory
User Rank
Rookie
re: How compact fluorescent lamps work--and how to dim them
old account Frank Eory   3/27/2013 5:42:57 PM
NO RATINGS
I missed this article the first time around, but glad I noticed it. Great explanation of how dimming works in CFLs.

Page 1 / 2   >   >>
Most Recent Comments
Susan Rambo
 
AZskibum
 
AZskibum
 
alex_m1
 
alex_m1
 
AZskibum
 
AZskibum
 
_hm
 
_hm
Flash Poll
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Top Comments of the Week