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2007-12-31
A 2007 Of IBKC
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New Year's Eve
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2007-12-27
Privated Profits, Socialized Risks (Reblog)
Who was the first person to talk about "privatized profits, socialized risks" to describe the United States' current capitalist society? It is so succinct and so true, and I wish I knew what name to hang off of it when I'm inevitably caught stealing the line at parties.
I think I first saw the phrase in Water Wars, a 2004 piece focusing on water companies in the developing world. It is everywhere now, currently popping up throughout discussion of the real estate crash and subprime meltdown.
How uneducated -- or reducated -- do we have to be to think this business strategy is a good thing to apply to every aspect of our lives?
Clearly we're at that level of education now.
I think I first saw the phrase in Water Wars, a 2004 piece focusing on water companies in the developing world. It is everywhere now, currently popping up throughout discussion of the real estate crash and subprime meltdown.
How uneducated -- or reducated -- do we have to be to think this business strategy is a good thing to apply to every aspect of our lives?
Clearly we're at that level of education now.
2007-12-24
'Twas The Night Before... (Pets)
Chimp Lovin' (Pets)
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This is the chimpanzee's second life, repaired by Dr. Frankeniczenko. Originally it had a fairly sizeable agitating motor and chimpy speaker as a heart, with wires leading to one hand that you could squeeze to set it off. Mag quickly learned how to trigger it, and it was a brief favorite before its inevitable demise. Of course while I was enjoying the dogs focusing on something other than me, they opened the poor pink animal up and chewed right through the wires. I took away the electrical components, but not before Mag had figured out how to bridge the wire stubs coming out of the motor with her tongue to make it shake and shriek like a horny primate. As a zombie the chimp makes do with just a normal plastic bulb squeaker heart.
Recent Edibles (Chow)
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Scylla's White Christmas Lap (Pets)
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Brittles (Chow)
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2007-12-21
Molten Chocolate Boob Cake
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In any case, she's making a second desert later in the week, so I'll keep listening.
'Dolon Closeup (Pets)
Gingerbread Failure (Chow)
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Our Non-denominational Tree
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2007-12-15
First Snow (Pets)
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LED Christmas Lights
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There are a couple of reasons LED lighting is attractive compared to normal incandescents, with the runaway favorite being efficiency. LEDs also have a longer life than incandescents and, being solid state, are much more durable and temperature resistant. These benefits are offset by a higher cost.
- A 6W LED bulb (actually an array of LEDs) might have a life span of 60,000 hours, over which it will draw about 360KWh. Let' say a quarter per KWh -- a high but convenient estimate -- for $90 of electricity for its life. Bulb cost? Perhaps $50. 60,000 hours for around $140.
- A 60W incandescent, comparable in lumens, might have a life span of about 1,500 hours. Over the LED's life span, that is 40 bulbs drawing a total of 3,600KWh for about $900 of electricity. Bulb cost? For the 40 bulbs, a bit less than the single LED. 60,000 hours for $950.
- Although CFLs aren't manufactured into Christmas lights, they end up a lot closer to LEDs than to incandescents. A 14W CFL, comparable in lumens to the above bulbs, has a life of around 10,000 hours. Over the LED's life span, that is 6 bulbs drawing 840KWh for about $210 of electricity. 6 bulbs might be about $20, so 60,000 hours are $230.
We use strands of mini bulbs on our indoors tree. These are candle-shaped T1¾ bulbs, also sometimes called an M5. The standard incandescent strand has 48 2.5V lights strung in series to match our 120V mains. Such a strand is about 25W, and if you run it flat-out for a heavy month each year (let's say 1,000 hours) you'll eat an electrical bill of $6.25 for 25KWh, still assuming our perhaps unreasonably high electricity rate of a quarter per.
The claims on strands of 50 LED Christmas lights vary, but from what I've seen they look to be about 5W total pull for a strand of 50, with an advertised life of 25,000 hours or more. Such a strand comes out to an electrical bill of $1.25, 20% of our incandescent cost.
The incandescent minis will have a longer life than a larger incandescent in a pristine environment, but given the rough handling that such strands take they often suffer early death. Continuing my made-up numbers, let's say a 2,500 hour life for the incandescent strand, so we'll need 10 of them over the lifetime of the LED strand. At $2 a strand, total incandescent cost for 25 years of use is a little less than $180. A single $20 LED strand racks up a charge of a little more than $50.
Easy math sure is easy. If I stop being concerned about working the numbers out in my head and plug in a more typical electrical rate of 7¢/KWh, our comparison changes to $37 for the incandescents versus $29 for the LEDs. The more the rate drops the less exciting the LEDs become, although I don't think anybody has cheap enough electricity to ever make the incandescents an efficiency win -- over a 25 year period of use, anyway.
LEDs have some other advantages besides cost. They operate at much cooler temperatures, and are unlikely to ever set anything on fire because of their heat. They usually fail by shorting, which means they have a built-in shunt to keep the strand lit when a bulb goes. They are more durable, with no filament -- although actual durability is complex, and there have been consumer reports of these lights dimming with age, corroding leads made of iron or steel, and in general a failure to squeeze the advertised life out of a strand.
Then there is the issue of how cheaply the LED strands are made. Our household sockets give us AC power, which means when we plug our hot new LED solid state lighting into them the bulbs will only be lit half the time unless the manufacturer spends a little extra money on a rectifier. Without a rectifier, the LED strands will have a 60Hz flicker -- some people are insensitive to this, but alas I am not. I haven't seen any LED strand packaging that would give a clue as to whether this issue is addressed or not, but I have seen flickering LED lights.
In any case, I guess it isn't totally unreasonable that LED Christmas lights are everywhere. They aren't totally irrational from a financial sense, since it is likely Christmas will keep rolling around every year for some time to help you make the most of your initial investment.
Before I put away my calculator, though, I want to take a closer look at the 25,000 hour rated life of a 50 LED strand. If we put 3 strands on our fairly small tree and run them constantly, in a week of 168 hours we've got 25,200 lit hours, and should expect to see a bulb failure. So replacement bulbs still won't be a thing of the past. (Failure for LEDs is more typically a very dim bulb than a bulb going dark.)
Some informative sites: Ciphers by Ritter, LED Center, and of course Wikipedia.
2007-12-11
Kitchenarium Updates (Chow)
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2007-12-10
Spiced Fruit Reduction (Chow)
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2007-12-07
66 Years Ago Today
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The Japanese aerial photograph above shows Battleship Row during the initial attack. In the foreground, the Oklahoma, California, and West Virginia are taking torpedoes; Hickam Field is burning in the background.
2007-12-06
Happy Scylla (Pets)
2007-12-04
Liquid Sculpture (Recommendation)
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Monkey Love (Pets)
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2007-12-03
Eww, Hardware
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- Get the new hardware in place,
- Get Fedora 8 installed,
- Figure out how to mount and serve an external NTFS-formatted USB backup drive,
- Get Galleon up and running for the Tivo.
Trial Interspecies Détente (Pets)
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