Flourescent Lights - Page 4 - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 04-11-2007, 09:08 AM   #31
Registered Member
 
Join Date: Mar 2007
Posts: 1,138
Country: United States
I grabbed the first CFs I saw, too. They said something about "natural light" and "white light" and all that, so they sounded good. When I got them home and installed one, it seems incredibly blue and flat and bleah. I think that indoors, we are used to a more yellow cast. Technically, the bulb I got may be more like sunlight, but aesthetically it is baaaaad. I will eventually return it to BigBoxMart and see if they have something in a lower temperature range.

We have gotten CFs before that are an acceptable color and I really like them.
__________________

__________________
Bill in Houston is offline   Reply With Quote
Old 04-11-2007, 10:46 AM   #32
Team OPEC Busters!
 
GasSavers_Brock's Avatar
 
Join Date: Oct 2006
Posts: 196
Country: United States
I swapped out our living room to CF's. They used to have six 75w floods in the ceiling cans. I bought six 13w floods. So I went from 450w to 78w basically I am using the same power with all six as I did with just one incandescent. Now I don't mind when the kids leave the lights on all the time.

I have very few incandescents left in the house, just the bathroom vanity (on a dimmer) and the bedroom ceiling (also on a dimmer) Everything outside and even the chandelier have CF's in them. Those little 3 and 4 watt candelabra base lights are pricey!
__________________

GasSavers_Brock is offline   Reply With Quote
Old 04-11-2007, 11:05 AM   #33
Registered Member
 
Join Date: Mar 2007
Posts: 1,138
Country: United States
We live in an older house here in the tropics, and one of the things I love about the CFs is that they don't put out anywhere near as much heat. For example, our vanity fixtures have room for 6 bulbs, but the bathroom gets unbearably hot with 240 watts of incandescents in there, so I usually put in just one or two bulbs. If I can find aesthetically acceptable CF replacements, we can have plenty of light AND stay cool. :-)
__________________
Bill in Houston is offline   Reply With Quote
Old 04-11-2007, 12:19 PM   #34
Registered Member
 
trebuchet03's Avatar
 
Join Date: Mar 2007
Posts: 812
Country: United States
Send a message via AIM to trebuchet03
Quote:
Originally Posted by DaX View Post
So am I right in assuming an ideal color temperature is between about 4700K and 7200K? Is there a downside to using a more "white" and less "yellow" bulb? More energy consumption?
"Ideal" is a matter of preference.... If you're used to incandescents, you want a cooler (more red) light -- a 100W incan. puts our a temperature of 2870K, but when it blows out - that flash is hotter (more blue in color because the filament is a lot hotter while it breaks apart):P So somewhere around there for a CF bulb. Fluorescent light temperature is different than that of a incandescent bulb - that wiki you linked to mentioned black bodies (perfect emitters) of which a fluorescent light is not (and doesn't follow the color temperature scale exactly).

If you want to mimic sunlight (which is different than daylight mind you) -- that greatly depends on what time of day and your latitude and the season you want to mimic. But that range is around 2000(sun rise/set)-5400K (summer - noon). Daylight - which takes into consideration the sun+sky ranges from 2000 (sky doesn't add much at rise/set)-6500K. And finally, color temperatures rise in the shade - that is, no direct sunlight.

Now this probably is really confusing.... but here's the last bit... CRI - Color Rating Index. CF bulbs are not black bodies -- that is, they do not emit all the time. In fact, they are operating at twice your mains power frequency cycle and are off two times per cycle! During that cycle, power is not constant - so the color temperature emitted changes with time - at twice your mains power frequency. So for those of us operating @ 60Hz (most of us) - our lights cycle at 120Hz.

Now, back to CRI. The CRI equates a non black body light source to a black body light source. The scale is from 0-100 - 100 being the black body - perfect color temperature representation. But, this comparison only works to compare two sources of the same representation. So if your bulb selection includes a CRI index, pick the color you want and then pick the highest CRI Mind you, 6000K with a 70CRI may not be better than a 5000K with 60CRI - temperature is key.

So my final point is - the best bulb temperature is a personal thing. For a reference, commercial/professional daylight photo flood lights are 4800-5000K - which is where I'd like my lights to be 6500K is another common temperature and a lot of home-use (that is, not professional) electronics are calibrated to this color temperature. It's likely your P&S camera is default at 6500K

-----
Hopefully I didn't scare anyone You can learn all this by reading photography books and such :P But picking the "right" color isn't too hard. And if it's really bad, you can always return your bulb and you'll know - yes, I need more blue (hotter light) or more red (cooler)
__________________
Time is the best teacher. Unfortunately it kills all its students.


Bike Miles (Begin Aug. 20 - '07): ~433.2 miles

11/12
trebuchet03 is offline   Reply With Quote
Old 04-11-2007, 12:48 PM   #35
Moderator
 
GasSavers_DaX's Avatar
 
Join Date: Oct 2005
Posts: 1,209
Country: United States
You didn't scare me too bad, I remember some stuff about black body radiation from heat transfer in college.

I don't think the wiki article is saying that the bulb is a black body emitter. As I understood it, it was saying that a black body is the standard against which other light sources are compared - that a "5000K CF" bulb's color is directly comparable to a black body radiation emitter at a temperature of 5000K (there is no way that the CF bulb is burning at 8500 degrees F!).
GasSavers_DaX is offline   Reply With Quote
Old 04-13-2007, 11:47 PM   #36
Registered Member
 
Join Date: Apr 2007
Posts: 21
Country: United States
Send a message via AIM to eivad1 Send a message via Yahoo to eivad1
i saved over 1000 watts in my house and have taken my bill from 190 to 120 a month.
eivad1 is offline   Reply With Quote
Old 04-14-2007, 12:13 PM   #37
Supporting Member
 
cfg83's Avatar
 
Join Date: Sep 2006
Posts: 1,779
Country: United States
eivad1 -

Quote:
Originally Posted by eivad1 View Post
i saved over 1000 watts in my house and have taken my bill from 190 to 120 a month.
Wow! That's proof in the pudding. These days in California, if you time it right, you can get the CF's subsidized by the power companies so that they are the same price as incandescents.

CarloSW2
__________________
Old School SW2 EPA ... New School Civic EPA :

What's your EPA MPG? http://www.fueleconomy.gov/feg/calculatorSelectYear.jsp
cfg83 is offline   Reply With Quote
Old 04-16-2007, 12:09 PM   #38
Registered Member
 
Join Date: Apr 2007
Posts: 21
Country: United States
Send a message via AIM to eivad1 Send a message via Yahoo to eivad1
well my 1st bill in january was 180 know i just got this months bill. 60 dollars what a savings im just wondering what elese i can save on
eivad1 is offline   Reply With Quote
Old 04-16-2007, 06:05 PM   #39
Registered Member
 
Hot Georgia's Avatar
 
Join Date: Sep 2006
Posts: 24
Country: United States
A couple years ago we bought 4-5 packs of CFL's from Sams club. They were GE's and replaced all our incandescents in the major fixtures.

Within 3 months all were burned out except for 4 (out of 25-30)
We thought it may be a bad batch so we replaced the bad ones with units from Home Depo. $$$ again.

Sure enough almost all were burned out within a few months and the family got tired of a dim house. At the time we were down to 1 CFL per fixture (or less) with a mix of the old incandescent bulbs.

We have a big flagpole and is illuminated at night. I've bought 3 different types of CFL floodlights and if they don't burn out after the 1st rain, will certainly short out within a month or so. All are rated for outdoor use.

Typically, We hear arcing within the base then they quit.
I thought perhaps we are having some high voltage spikes but it's only the CFL's that have problems.
Surely they have warranty but it seems pointless to keep a constant flow of light bulbs.

After spending a few hundred dollars on CFL's we finally grew tired of them and bought a case of 45w incandescents at Sams for only a few $.

We have one of those tall 3-bulb lamp posts out in the back controlled by a photocell and is the only CFL's which have lasted- two years now.

I looked into LED lights but the only ones which seem to emit nearly enough light cost around $80/ea. (Ouch!)

I can't imagine living in a State that ever passed a manditory CFL law.
I'd either buy them abroad or burn candles

-Steve
__________________
2004 Civic Hybrid AT (CVT)
Personal record: 1003Miles on single tank, 74.9MPG calculated.
Supporter of http://www.fairtax.org
Hot Georgia is offline   Reply With Quote
Old 04-16-2007, 06:10 PM   #40
Registered Member
 
MetroMPG's Avatar
 
Join Date: Dec 2005
Posts: 4,223
Country: United States
About 2 months ago I also switched the majority of the incandescents over to CFLs. The difference being I purposely looked for bulbs with a guarantee (because I'd heard of the premature burn-out issue).

I didn't find any with a "store" return guarantee, though. If they do quit, the only option is to mail them back to the manufacturer (in my case, in Quebec, if I recall).

Of course that means we also had to save the packaging, with the receipts.

EDIT: no burn-outs yet...
__________________

MetroMPG is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
A word of friendly advise Mighty Mira General Discussion (Off-Topic) 8 07-31-2006 06:40 PM
Summer time testing... need your ideas Matt Timion Experiments, Modifications and DIY 28 07-22-2006 07:34 PM
Need some help mtbiker278 General Fuel Topics 4 04-14-2006 10:16 AM
compressed air car MetroMPG Electric and Solar powered 7 04-09-2006 11:59 PM
Any ideas how to install this? Compaq888 General Maintenance and Repair 0 12-21-2005 01:46 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 09:44 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.