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#1 | |
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∂2ω=0
Sep 2002
República de California
103·113 Posts |
http://www.nytimes.com/aponline/worl...-the-Bulb.html
Anbody here ever use compact fluorescents at home? I've just never liked the quality of light they produce - they lack the "warmth" of incandescents, in both the literal and the figurative sense. But perhaps some varieties are better than others in terms of quality of light. Interesting that Australian PM John Howard (a.k.a. "The Aussie Dubya") is behind this legislation. Full text of the AP article, in case the NYT link goes stale: Quote:
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#2 |
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"Nancy"
Aug 2002
Alexandria
1001101000112 Posts |
I'm using almost only CF by now. They save a bunch of electricity and money, and the quality of the light is pretty good if you go for a decent brand. All modern CF have a color reproduction index (CRI) >80 (usually ~82), where 100 is perfect black-body radiation. If CRI ~82 isn't good enough for you, there are "full spectrum" lamps with 5 phosphors instead of 3, giving the lamp a CRI >90. They are slightly less efficient and noticably more expensive, though.
A nice thing is that they come in different light temperatures. I found 6000K very useful for working, as the very bright and cold light really keeps you awake. I'm in France now, and there is electric heating almost everywhere in homes, so it doesn't really matter if I use old bulbs or CF, so long as it's cold enough that I need heating. But I guess I'd rather buy a few cheap computers and use their heat for keeping my flat warm rather than light bulbs, that way at least I get some number crunshing done. Alex |
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#3 | |
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Dec 2003
22×41 Posts |
Quote:
I can strongly recommend General Electric's 6500K 26W energy saver bulb. See page 11 of this 18 page PDF: http://www.gelighting.com/na/busines...luorescent.pdf Order Code 85397 Compared with other fluorescents, the difference is like night and day! Unfortunately, the lamp contains Mercury so one must pay attention when disposing. See www.lamprecycle.org Seriously, this is the best fluorescent I've owned. I intend to replace all of mine with this 6500K, 1600 lumens bulb. But what to do with all my old "yellow" fluorescents? Maybe buying them wasn't such a bright idea after all?
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#4 |
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Mar 2003
New Zealand
13·89 Posts |
The first compact-fluorescent bulbs I bought cost $30 each, electricity was about $0.10/KWh, and they still worked out cheaper than incadescent bulbs.
Now they cost $3 each and electricity is $0.18/kWh. |
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#5 |
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"Nancy"
Aug 2002
Alexandria
2,467 Posts |
If you go for quality, they'll probably be a little more expensive than $3, but the extra money is worth it. Make sure the CF uses an electronic ballast instead of a conventional inductive one. It eliminates flicker, improves efficiency and lamp life. Also, the name brands usually put more effort into reducing the amount of mercury used in the bulbs than the cheapest manufactureres do.
Alex |
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#6 | |
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∂2ω=0
Sep 2002
República de California
2D7716 Posts |
Quote:
And what does the Lampre pro Cycling team have to do with this? It seems like a strange marriage ... Then again, leg power = energy-efficient transportation, so maybe that's the connection. Serious question: is the light from 2700K-rated bulbs significantly "warmer" than the the 6500K? I'll have to see if Target carries these next time I'm there . |
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#7 |
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"Nancy"
Aug 2002
Alexandria
2,467 Posts |
Yes, very. The 6000K stuff is really hard, cold light. Good for working, but not so much for a romantic dinner or a comfy evening with the TV on.
Here's a pic of a 2700K lamp (on the wall) and a my 6000K (in the globe thing). Alex |
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#8 | |
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∂2ω=0
Sep 2002
República de California
101101011101112 Posts |
Quote:
Thanks for the pic - assuming both kinds are similar in terms of efficiency (lumens per watt), I'm definitely going for the lower-temp ones, since in my case I already have regular fluorescents in my household work areas. |
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#9 |
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"Nancy"
Aug 2002
Alexandria
246710 Posts |
The 6000K is slightly nasty - the blue tint isn't really as strong as it seems on the pic, but a bluish hue is definitely there. A good compromise is 4000K, which is also available in CF. It is the most neutral white color in bulbs, and is what most people probably would want in their work spaces.
In terms of efficiency, the 2700K, 4000K and 6000K are very close. There are special colour temperatures i.e. for Seawater Aquarium that need a lot of UV, where you can buy up to 15000K, although not as a compact bulb. Those very high color temp flourescent lamps have noticably lower efficiency. Alex |
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#10 | |
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Jun 2003
2×7×113 Posts |
Quote:
Though for illumination purposes people should switch to flourescent light as it saves electricity and $. |
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#11 |
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6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
9,787 Posts |
There are several problems that I am aware of regarding CF's. (not CFC's, that is a different issue.)
1.) Noise, the high pitch buzzing/whine. I have a relative that can't stand them. I have some over my vanity and at night they quite noticeable. 2.) Flicker, some of us, especially those of us with certain conditions are irritated by the flicker. School children sometimes suffer. While it is shorter than the 1/40 of a second figure, it is still noticable. Put a flourescent lamp over a ceiling fan and I go .3.) Physical size/shape/format. The space under my ceiling fan was designed for a 100w standard bulb. I can't find a CF that looks good, fits, and is bright enough. The 100w equiv. bulbs look nasty or are monsters that hang way down. Smaller bulbs are too dim. I have a nice looking table lamp that a CF can't fit into. Either a standard or the new halogens will fit. I also am trying to find some CF's that fit into some 'cans' and other enclosed fixtures. The built in reflectors prevent the CF's from fitting. LED's seem to have advantages to CF's. I have given serious thought to building some LED lamps. These would work well in recessed fixtures, they would throw all the light in the desired direction. I have even thought about starting a company to produce LED lamps that physically match incandesents (or are smaller). The 100-120Hz flicker can be taken care of with a filter. With a multi component LED lamp, the color can be tweaked by inclusion of various LED colors. |
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