'Most energy-efficient' LED light revealed by Philips
Of course, they simply have to drop one in the story:
"In the US, for example, such lighting consumes around 200 terawatts of electricity annually."
But what do you think is the truth of this? Philips' PR? or genuine technological advance?
I was about to post the same reference to show that the BBC is as clueless about units of electricity consumption as the average cabinet minister.
I wonder how much energy it takes to make....
No doubt it cots a fortuneand wont turn out to last, but will become a rubber stamped de jure replacement after Philips has greased the right palms in Brussels.
Quite -the only reason to target offices is that they can charge a higher price by claiming to offset against cost of replacing, etc. as well as any energy usage reductions.
Mind, the lower the frequency of replacement, the thicker the dirt build-up...
I have, as so many times, complained to BBC about their accuracy. Makes me feel better (I hope) - because it certainly doesn't make them report any better.
The frightening thing is that no one seems to understand anything technical at all ingovernment, and the media, and even more frightening, no one seems to think it matters.
Its patently a glossy press release that has landed on the desk of all the technology jouranlistas everywhere. And been cut pasted and slightly edited.
I have to say, the PR people who produce some of the releases are pretty darned good. Somehow, if you do start to re-write one simply to put it on your own words, you get drawn back to what they wrote in the first place! But a seasoned journalist should know better than trust anything produced by a giant company.
At current LED tube prices, I'd hate to re-tube an office block:
Changing topic slightly, we are re-plastering the lounge and having lath and plaster ceiling replaced. Room is not huge, 5x5 metres. Any thoughts re. lighting options these days?
We have three "table" lamps with fairly high wattage/high colour temp. CFLs controlled by plug-in remote switches. Two wall lights (which tend to wash upwards) with halogen lamps replacing the ES they were designed to take - almost never use them. Two ceiling fans with three tiny halogens each - used only when really necessary. One "desk" lamp on a small table in front of the sofa - which is used a lot. And a row of white LED "fairy" lights on one wall which seem to make the room seem larger!
So, the built-in lighting is hardly touched except when cleaning or something that needs the extra. But room feels quite nice.
The frightening thing is that a high proportion of "news" articles are cut and pasted press releases and no one seems to think it matters.
We don't always agree about green issues but I am with you 100% on this.
Only lobbyists, lawyers, accountants and PR men carry any weight in the corridors of power. They fire any scientists that give them advice that conflicts with their political prejudices. A previous President of the Royal Society so neatly summed it up that the government wants to have "policy based evidence rather than evidence based policy".
Looks like this is the original Philips PR source material.
I can't figure out from reading it whether they have a real prototype consumer device that would fit in place of a say 50W fluoro tube in an office and use 25W or a single LED component that on an infinite heatsink at some unspecified but probably low current will manage
200lm/W. If the latter then Cree beat them to it last year at 1W.This sort of 200Lm/W number is the Holy grail of lighting because it is close to the physical limitations of the very best efficacy low pressure sodium vapour lamps in converting electricity to light.
I have a couple of 7W Philips LED spotlamps and they are not bad in terms of colour temperature and brightness but a bit too directional.
Its interesting.. I had occasion to take some pictures in a well lit (by striplight) hall the other day. I was amazed that the expected green cast of fluorescents did not appear, although there was an obverall reddish cast, and it played merry hell with anything in the purple /magenta area..looks like the cameras CCD was expecting a white light rather than a series of narrow spectral lines.
But way better than it used to be.
Interesting point about sodium., I know its got marvellous efficiency (what does an arc light do?) but oh my gawd, that orange monochrome..
But here the target is of course striplights which do about ten years of very low consumption lighting at relatively low cost.
I am sure LEDs will get there in the end. Or some similar technology, but I doubt they are there yet..
It has always been the case as far back as at least the 1970s and probably forever. News editors are lazy and on a slow news day you have a very good chance of your press release being published verbatim.
I wish they would online at least provide a link back to the original source since journalists often destroy the integrity of anything where there is some subtly in the actually scientific conclusions.
which makes the same gross error in terms of terawatts versus terawatt hours.
If PHILIPS cant even get that right, what hope is there left anywhere?
Almost all modern CCD cameras (and even webcams) firmware recognise an incandescent lamp or fluorescent tube white balance and adust the image accordingly. Some can even get reasonable colour rendition under HPS with a bit of help from a filter that removes some of the excess yellow.
Depends what you use it for but it is fabulously good for dazzle free street lighting because the tube is physically big. Astronomers prefer it because its mostly D-line output can be easily filtered out.
I think they are now good enough that iff you include the lifetime electricity they will use some of them are now interesting to try at least for early adopters. The risk is their lifetime may be overstated. YMMV
Considering the entire generating capacity of the USA is only just over one terawatt (Wiki so feel free to correct), those lamps must be pretty darned amazing to save 200 terawatts!
Similar reasoning could explain why our media publish so much about the USA compared with what they publish about our neighbours in Europe. American news is plentiful, cheap, and in English. This effect is especially noticeable with election news.
Well lets see if these are reliable before fitting such things in everything from magnifiers to Spacecraft shall we? As not much of said company seems to actually exist in reality now, one has also to ponder whether its someone like LG or toshiba or someone sho make it.
Brian
actually I THINK Phillips still have SOME semiconductor fabrication plant left..
Prolly comes from those that prattle on about power consumption rather than energy consumption (or conversion, really).
On Saturday 13 April 2013 02:41 Arfa Daily wrote in uk.d-i-y:
It's the new catholicism. And anyone who says otherwise is a heretic and shall be burnt at the stake.
How much CO2 from an average stake burning?
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