Lightbulbs

[glennPattonPub]

Oh good I though I was the only one :rolleyes:

[Bergholt Stuttley Johnson]

they used the exclamation mark, dont you know your history sheesh who did invent the light bulb? (I know it wasn't the crook Edison)

You cant outrun the world, but there is no harm in getting a head start Real stupidity beats artificial intelligence every time.

[Dalek Dave]

Swann?

--------------------------------- Obscurum per obscurius. Ad astra per alas porci. Quidquid latine dictum sit, altum videtur.

[Bergholt Stuttley Johnson]

Nope (and he never made such a claim unlike Edison) Swann deveoped the vaccum process that made then last but he himself said that the basic idea had been arround for years

You cant outrun the world, but there is no harm in getting a head start Real stupidity beats artificial intelligence every time.

[Dalek Dave]

Tesla then?

--------------------------------- Obscurum per obscurius. Ad astra per alas porci. Quidquid latine dictum sit, altum videtur.

[Mark_Wallace]

Fork 'andles.

I wanna be a eunuchs developer! Pass me a bread knife!

[Dalek Dave]

Boom tish

--------------------------------- Obscurum per obscurius. Ad astra per alas porci. Quidquid latine dictum sit, altum videtur.

[Bergholt Stuttley Johnson]

don't know thats why I asked

You cant outrun the world, but there is no harm in getting a head start Real stupidity beats artificial intelligence every time.

[Nicholas Marty]

I don't think it was Tesla. I think there were multiple inventors who "invented" the lightbulb before. Edison was mereley the first to put the invention to some use. From todays perspective it might be that Edison just claimed to be the inventor so that he could claim patent rights on it ;P

[Corporal Agarn]

For light compare lumems[^]. Different 40W bulbs will produce different amounts of light. That said here in the colonies we have a similar ban. Now instead of wasting energy, we are polluting with mercury and other things using the CFL[^] bulbs that do not last as long as we have been told. By the way LEDs do a good job of dimming. I just installed a spot light (yes I know you want candle) that stays dim until someone walks by when it goes to full on.

[AlexCode]

According to "the web" was Humphry Davy... :)

[Dan Neely]

Rob Philpott wrote:

LED bulbs do seem to be getting better, but surely they emit a distinct amount of very fixed wavelength light, not the broad spectrum you'd get from an incandescent bulb. A bit like fluorescent bulbs

That's only true of really cheap bulbs or those intended as outdoor insecurity lights, etc. Like CFLs or many incandescents (to change the color temperature ex 'daylight' bulbs) good residential LED bulbs use phosphor coatings to convert the light from the LEDs into a broad spectrum similar to natural sunlight. Aside from a spike in the blue part of the curve where light not captured/reemitted by the phosphors gets out you'll get something that looks a lot like the blackbody curve of sunlight; they're much better than CFLs in that regard (CFLs are much spikier); the color balance won't be the same as with most incandescent because their black body curves are for much cooler temperatures than the sun meaning they peak in the IR not the yellow range. This article from last year's Popular Mechanics[^] has test results from about a dozen and a half bulbs of different types; on the bulb slides you can see spectral curves

Did you ever see history portrayed as an old man with a wise brow and pulseless heart, waging all things in the balance of reason? Is not rather the genius of history like an eternal, imploring maiden, full of fire, with a burning heart and flaming soul, humanly warm and humanly beautiful? --Zachris Topelius Training a telescope on one’s own belly button will only reveal lint. You like that? You go right on staring at it. I prefer looking at galaxies. -- Sarah Hoyt

[GenJerDan]

Time to start a new business: Re-tungstening burned out bulbs. Hmmm...

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[Rob Philpott]

That's an interesting idea. I don't know how they do it, but the bulbs you get on Christmas Trees short-circuit when they blow so that the others stay on. Perhaps you could use that technology to switch to a second/third/fourth filament when one blows. I'm off to the patent office.

Regards, Rob Philpott.