before evaluating religion
Hiya more details can be obtained at http://www.linkedin.com/groups/AI-singularity-unpredictable-phenomena-4368411 thanks to God; Now it should be interesting to deploy the force of the religion...
View ArticleTrying to convert a spectra into CRI
I posted this to sci.color, but got no real response. Perhaps someone here could help me. I am trying to figure out the algorithm to compute the color rendering index from a spectrum (spaced 5nm...
View ArticleElements engineering and Amici prism spectra
Folks, After popular demand, the amici prism spectra and the elements engineering page can be hosted "somewhere" but I don't know where, because my server is disabled. If anyone has some decent space,...
View ArticleVertical T5s
**Hi, see pic of local council building with many hanging fluoros in foyer: http://www.denhamconstructions.com.au/img/projects/ashfield-civic-centre_1.jpg The hanging tubes appear to be T5s and there...
View ArticleVic Roberts is the guy for RF Discharge Question
On 8/19/2012 7:15 AM, Ian Mackay wrote: > Hello lighting folks - wonder if any one here can help? > > I'm working on an RF discharge tube project (as a spectroscopist, not as a > lighting...
View Articleoffice lighting recommendation
Hi. I'm in an office with standard Flourescents. I'd like to find some bulbs (reasonably priced) that will me more natural/less visually straining on my eyes as I stare at a computer all day. Can...
View ArticleQuestion about halogen bulbs.
In the past these were always 12V, but now some of the same physical size are coming out in 240V. 1/ Are the 12V ones being phased out? 2/ Are the 240V ones as good as the 12V ones?
View ArticleHow to interpret fluor. tube colors? -- Followup
The fluorescent lamp on a Kenmore Model 250 stove (now 20 years old) has started wrecking new fluor. tubes (Sylvania, 22-inch, 18 watts). Symptoms are: 1. Dark grey bars appear at both ends of the new...
View ArticleWhy don't they make this: CFL insertion socket?
Trying to get a CFL to work in a pole lamp triggered an unrelated idea. (the lamp is European; apparently there is a difference between E26 and E27fixtures that is just enough to make some brands of...
View ArticleNeed 12V F8T5 ballast
Does anyone know where I could find a 12V ballast for a F8T5 fluorescent lamp? I have a scanner where the main board has quit powering one of the lamps. Thanks in advance. Steve
View ArticleG24 Bulb/Socket Question
I have some G24 LED lamps, and have a problem with two types of sockets, the socket is not deep enough for the bulb to seat. The bulbs are G24D, the sockets are G24Q , if that makes any difference. One...
View ArticleHow man y watt FPL light tube should I use?
Hi I am non from electrical background. At my place there is box say don't know what to call this say light box . It has choke fixed of 40 watt as we found in old age tube light plates. There is place...
View ArticleSmall bulbs always burning out.
I have a truck with a plurality of lamps, of 12V, 21W. They don't last long and replacing them is a tedious chore. I want to reduce the voltage to each bulb to take the load off the filament and so...
View Articlewhat makes a fluourscent tube fixture strobe?
This morning we lost a phase to our small office building. In two offices the overhead tube fixture strobed. This was continuous and very bright. It looked like half the tubes strobed and the other...
View ArticleStreetlamps - a strange irony...
Lots of UK towns are currently replacing streetlamps. In particular, low pressure sodium (of which we used loads on the UK) seems to be being phased out everywhere, and the last of the post WWII...
View ArticleWhy are these so rare and hard to buy?
http://thumbs4.ebaystatic.com/d/l225/m/mECvXoWTX5kQYnqJMaaaVMA.jpg http://members.iinet.net.au/~cool386/plug/light1.jpg http://www.electrical-contractor.net/mt/DLA2.JPG The old double lighting adaptors...
View ArticleIn need of some of Modules for Wossloh G -1700
1. Can Node Module 81 80 - 25.A01.12 - Programmed 2. Can Node Module 81 80 - 25.A02.12 - Programmed 3. Can Node Module 81 80 - 25.A03.12 - Programmed 4. Can Node Module 81 80 - 25.A04.12 - Programmed...
View ArticleSMD lighting led
My modest project consists in making myself a pendant lamp for my living room using linear lighting sources. I have questions and need your advice: It seems that low output 4000k white SMD led are more...
View ArticleIs the buzz from fluorescent lighting temperature dependent?
We do our music practice in the basement to avoid annoying the neighbors. The fluorescent lights (4 foot tubes) have an annoying buzz to a musician. (60 Hz is halfway between Bb at 58 and Bnat at 62)...
View ArticleX10 to 0-10V conversion
Has anyone come across a small module (ideally small enough to fit inside a fluorescent luminare) which will pick up mains-borne X10 signals, and output a 0-10V fluorescent dimmer control voltage? --...
View Article45 LPW Incandescent?
At the Energy Star Conference in Denver a few weeks ago, Advanced Lighting Technologies (ADLT) stirred things up nicely by announcing that they would be introducing, along with CFL manufacturer TCP,...
View ArticleT5HO lamps for indoor plants
I live in Minnesota, where the winters are 6 months long. To keep from going crazy, I do some gardening in my basement. Not cannabis, (not that there's anything wrong with that) but hot peppers and...
View ArticleIncandescent globes for use in elevated temperature environments (Ovens)
Can anyone tell me what are the constructional differences between an ordinary off the shelf incandescent globe and those that are 300C rated for uses in ovens and similar environments? It seems to me...
View ArticleUV light from flourescent
What is the typical range of wavelengths emitted by a UV flourescent tube found in a cheap handheld torch like the one in this picture?...
View ArticleCFL delay
Hi, I am hoping someone with more experience can give me a little advise on this. I have 2 cfl 10w recessed lights on one switch. these are 4 pin g27 bulbs.. when i turn the switch on, one light comes...
View ArticleMeasuring of CCT
Moin moin, I have here: 1. an used Minolta CA100 (not the plus), last calibration 2005 2. a freshly from Gossen calibrated Gossen Colormaster 3F 3. an integrating sphere 30 cm diameter, painted with...
View ArticleFloodlight for residential back yard
Hello all! I am looking for an outdoor floodlight for a residential back yard. The quick version is that the customer now has a cheap 300W linear halogen floodlight and loves the brightness and...
View ArticleDraining NiMH by using LED in flashlight?
Is it true you an use an LED flashlight to drain an NiMH rechargeable AA cell to a suitable voltage in order to condition the cell? ISTR that NiMHs should nto be drained to below 0.9 volts. Would an...
View ArticleDetecting Subtle Brain Injuries
New imaging methods may help distinguish brain damage from psychiatric disorders. By Emily Singer Researchers have shown that three novel imaging techniques can detect mild brain damage not visible...
View ArticleLED Interfered With IR Remotes???
I've been using a 7 watt LED bulb, sold through Boston Robotics, for about a month in our TV room lamp. It's worked fine with the slide type dimmer. Today thought, there was a bizarre occurrence. All...
View ArticleDimming Incandescent and Halogen Incandescent Lamps
Does anyone have a reference or comparison graph of lamp watts vs. light output (lumens) for (1) standard incandescent (2)halogen incandescent (3) halogen IR incandescent lamps? I'd like to be able to...
View ArticleWhy LEDs are more efficient than CFL
LEDs are more efficient because they focus all their light in the direction it is to be used? The tubular shape of CFL mean lots of lumens going in the wrong direction towards inefficient reflectors....
View ArticleEffect of starting on lifespan of general-lighting HID lamps?
I've done some searching a number of times in the past on exactly how adverse an effect on life frequent starting has on various (otherwise properly installed/operated) types of lamps,...
View Article101 Gadgets That Changed The World
This is a Popular Mechanics tribute to LEDs. Are the facts true or false? 31. LED Russian Oleg Vladimiovich Losev invented the first LED in 1927, though no practical use was found. Nick Holonyak, Jr.,...
View ArticlePhase-control-dimmable CFLs: my first impressions
So I went to Lowe's and bought some "dimmable" CFLs and light dimmers to play around with and fill in another conspicuous gap in my lighting experience. There seems to have been a lot of complaints of...
View ArticleQuick HPS warmup appearance question
Observing various HPS installations, I've noticed that some lamps turn their yellow-orange sodium color very early in warmup, whereas other lamps initially look white like a phosphored mercury or a...
View ArticleLux Live, London, 9-10 Nov 2011
Thought this might be of interest to UK readers... Lux Live 2011, Earls Court Exhibition Centre, London, 9-10 Nov 2011 http://www.luxlive.co.uk/ -- Andrew Gabriel [email address is not usable --...
View Article70-watt MH temporarily stopped working--overheated ballast?
Quick question: Do general-purpose-lighting HID ballasts typically have a built-in thermal protection device of some sort like some fluorescent fixtures have? I was operating a 70-watt metal halide...
View ArticleTCP TruDim dimmable CFLs
Has anyone heard of these? They look quite interesting. https://www.1000bulbs.com/category/tcp-trudim-dimmable-cfl-compact-fluorescents/ Spec sheet: https://www.1000bulbs.com/pdf/TCP-TruDim-specs.pdf...
View ArticleWiring mishap?
I'd like to think that I'm reasonably cautious and safety-conscious around this stuff, but despite my best efforts it sometimes just seems to hate me. Today I turned on my 70-watt M98 metal halide...
View ArticleConversion to color temperature
Can anyone tell me what colour temperature X=0.45, Y=0.41 equates to? (It comes from the specification of a warm white LED). -- Andrew Gabriel [email address is not usable -- followup in the newsgroup]
View ArticleCFL equivalance wattage changes
I notice a sudden recalculation of the equivalent filament light output ratings on the packaging of all CFLs in the shops in the UK. They are now mostly claiming almost the 1:4 ratio I've always...
View ArticleEnergy conversion efficency of lamps
Hi all, in Wikipedia and many other places the efficiency of artificial light sources, e.g. incandescent bulbs, is stated in per cent, and thus treated as energy conversion efficiency. Here, the...
View ArticleQ: glowing "paper" flat panels...
Hello Group, i like to know what the product name of the flat bendebable glowing panels is called. i saw it on Light + Building in Frankfurt 2002 they where glowing and it was possible to get it in...
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light fixture ratings 110V bulb tranformer and 220V source
Hi I live in Asia and have 220V power. Light Bulb choices are limited in the developing world and I would like to have natural light spectrum lighting during the winter when there is little natural...
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Measuring Color Temperature
Moin moin, is there a way, to ,,measure'' the correlated color temperature of a light-source (LEDs) without special equipment. GMC, Minolta etc. costs about 1k Euro and above, for a non-profit-job a...
View ArticleControlling Physical Model Lighting from a Digital Model
Looka this: <http://lmnts.lmnarchitects.com/interaction/ledstagelighting/>. Very cool.
View ArticleDetectable Ballast Interference
Sorry for the Xpost. There is an ongoing argument about ballasts giving off detectable interference. https://www.icmag.com/ic/showthread.php?p=3808279#post3808279 Is there a way to ultimately answer...
View ArticleJohn Waymouth Collection at the LRC
A short while back I mentioned that John Waymouth had donated his extensive lighting technology literature collection to the Lighting Research Center at RPI, and that they would make the collection...
View ArticleSpectral Distribution Glasses
I'm cleaning out some old piles of paper in my office and came across a pair of spectral distribution glasses that Philips gave out at a Light Fair or IES meeting, probably around 2000, based on the...
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