the 100W bulb lives on....

At 350 mA, 70-80 lumens, with forward voltage drop of 3.2-3.4 volts.

(100 lumens and more at 100 mA at similar or slightly lower voltage are available from Mouser, Digi-Key and Future, but at higher prices)

This means 70-80 lumens at 1.12-1.19 watts. Yes, it is common practice to call such LEDs "1-watt LEDs".

This means 59-71.4 lumens/watt. This is not counting losses in whatever is used to control the current through the LEDs.

Color temperature is stated as 6000-6500 K - sounds to me like a usual icy color white LED. Color rendering index is probably usual of LEDs of such color and efficiency, which has usually been said to be 70, maybe 75. (I have seen a few closer to 80.)

In comparison, home lighting usually "wants" color temperature in the range of 2700-3500 K and color rendering index at least 80, preferably past 90. Getting color temperature lower than 4,000's to 5,000 K and increasing CRI means less lumens out per watt in.

--
 - Don Klipstein (don@donklipstein.com)
Reply to
Don Klipstein
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Which, of course, means Fred's statement ("You will not be allowed ...") is invalid.

Ed

Reply to
ehsjr

for

would

=A0government

those who

Same to you .... potato chip.

Reply to
josephkk

I had one of those once, and the only drawback was that I couldn't access the hall closet and cook simultaneously. ;-)

Cheers! Rich

Reply to
Rich Grise

I'm not any kind of community leader, and I don't think that anyone who takes the time to post here is either.

I was active - in a very minor way - in my local Labour Party ward in the U.K. I'm not really in a position to take part in Dutch politics, but when I move back to Australia next year I may be able to get back into that scene.

Perhaps. I'm not changing the mids of our right-wing posters, but at least I am pointing out when they are posting nonsense.

I'm aware that there are better things I could be doing with my time, but I've not recently had much success in getting to any place where I could be doing any of them.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

or

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se who

He didn't specify a time when the prohibition was going to become absolute and all-embracing.

In the long term, he is certainly right - if Al Gore and his allies don't eventually force Phil Hobbs - or his hiers - to clean up their act, Mother Nature is going to re-adjust the environment in a way that won't be compatible with the persistence an advanced industrial society.

We still have the option to chose whether our descendants have to make do with renewable energy sources, or get decimated in a population crash brought on by runaway anthropogenic global warming.

Check out the Paleocene-Eocene Thermal Maximum

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for the kinds of interesting complications that can show up when the earth starts warming up. It looks as if there might have been some

1,500 gigatons of carbon injected into the atmosphere - perhaps from methane clathrates.

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There does seem to be quite a lot of it around today.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

Yes. It is capable of providing more bang for the buck if used to drive either air source or better ground source heat pumps for instance.

Waste heat from equipment like computers and motors. If the building is sufficently well insulated even the number of people inside it can provide additional space heating.

For space heating and hot water gas or oil are both way more efficient. Coal and wood are OK too but less convenient in practice.

Not enough time to get them developed and operational at least in the UK. The only option now is some form of tried and tested classic design. It hasn't helped at all that Fukushima went so disastrously pear shaped

- the anti-nuclear lobby has new wind in its sails again.

The old UK nuclear plant is getting seriously close to design lifetime (in some cases well beyond). We need to start new building now.

Regards, Martin Brown

Reply to
Martin Brown

That is one of the advantages of incandescent bulbs. The CRI is

100. The main reason women hate flourescent lighting.

Dan

Reply to
dcaster

Not necessarily. Ground source heat pumps cost a lot of money. One needs to factor that into any calculations on what provides the most bang for the buck. I found that putting the money into insulation was more cost effective. The cost of electricity also is a factor. Most of the electricity in the area around Seattle is hydro power. So the cost of power there is different than say in New York City. In the Seattle area electric resistive heat was at one time cheaper that oil heat. And natural gas was not available in many areas because resistive electric heat was about the same price. So there was no big demand for natural gas and it was not available in many suburbs.

For Large buildings even if they are not well insulated do not require any heating. They do require air conditioning. The Kaiser Engineering building is an example.

Reply to
dcaster

In order for the 4000-6000 K lamps to be comfortable, sufficient illumination levels should be used

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I have eight 18 W/950 (5000 K CRI > 90) fluorescent tubes illuminating the white ceiling. I find it quite comfortable, especially in the morning, when the increasing day light blends nicely with the artificial light, without colour differences.

Reply to
upsidedown

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My guess is that you'll get a delta T of at least 50C.

John

Reply to
John S

No problem for me. I don't have a hall (closet) and I don't know how to cook much.

Reply to
John S

One of the things I remember from my macroeconomics course is that poor people are much more likely to play the lottery than the better off people. In that respect, it is considered a regressive "tax."

I don't have the textbook any more, so I'll just have to trust my memory on that.

Reply to
John S

I also don't have a wife. I've been thinking about paying some lady to talk dirty to me.

John S

Reply to
John S

Well me and the wife has Hall sex at times, she sticks her head in the hall from one room while I reply in the hall from another room!, F**k, yeah, Scr** you, Too!

Jamie

Reply to
Jamie

Here you go:-

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Reply to
Spehro Pefhany

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ROTFLOL until my stomach hurt!

Reply to
John S

And thus I consider myself fortunate.

Reply to
Simon S Aysdie

We owned a MH, about that size, when I was in college. It wasn't about to happen after. Space is important.

Fantastic! ...forwarded to SWMBO. ;-)

Reply to
krw

Poor people make all sorts of irresponsible choices. That's why they're poor but it doesn't change the definition of "choice".

Free will may be considered to be regressive by "progressives" but that's just silly, like all their other "ideas".

Reply to
krw

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