U.S. CitiesCity-Data Forum Index
Go Back   City-Data Forum > U.S. Forums > General U.S.
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
Reply Start New Thread
 
Old 07-31-2010, 11:05 PM
 
Location: China
10 posts, read 13,949 times
Reputation: 13

Advertisements

Quote:
Originally Posted by Chriscross309 View Post
The only thing I know about LED lighting is that I see it in scoreboards in stadiums.
Yes,that is LED display.
Reply With Quote Quick reply to this message

 
Old 07-31-2010, 11:32 PM
 
Location: China
10 posts, read 13,949 times
Reputation: 13
Quote:
Originally Posted by Bydand View Post
I know enough about the LED technology to know that while it holds promise, it isn't quite to the point yet to replace either incandescent or CFL bulbs for household/commercial/industrial general lighting use. In order to break into the US market you would have to actually have a LED bulb replacement that works as promised (I haven't seen one yet, and don't expect to for at least another 5 or 10 years). Price wise, I don't see many making the switch if they are much, if any, more than the cost of a CFL bulb.

This comes from being an Electrician for 28 years and working with the public trying to get them to go to more energy efficient lighting systems. LED just isn't there yet.

Hi Bydand,glad to meet an electrician here,thanks for your reply. Yes,I know it will take a long time for LEDs to replace incandescent and CFL lights due to price and other factors. And indeed in the current market,maybe some LEDs' life span do not match what the manufacturer claimed.Usually the life expectancy we promise is more than 30,000 hours(close to 5 years),and it is really hard for the consumer to judge whether the bulb they bought could be used for 5 years or not,that is a problem.
By the way,can I ask you what kind of fields electricians mainly work in? and electrical contractors will directly import lighting products from abroad? That will help me to understand what are the pontential clients I should to explore.
Thank you.
Reply With Quote Quick reply to this message
 
Old 07-31-2010, 11:39 PM
 
Location: China
10 posts, read 13,949 times
Reputation: 13
Quote:
Originally Posted by grapico View Post
I would say no, I still won't even use flourescent bulbs. I find the way they make things look rather bad, especially in a household setting. I use older bulbs that are tuned to better lights. My gfs father also has an art studio and will definitely not use flourescent. I do not think LED would be much better.
Hi,do you mean the things look different from the real color they have? Professionally speaking,this is called color instruction.This maybe is another disadvantage now LED lights face,and we are now solving it.I believe CRI will be improved in the near future.
Reply With Quote Quick reply to this message
 
Old 07-31-2010, 11:47 PM
 
Location: China
10 posts, read 13,949 times
Reputation: 13
Quote:
Originally Posted by pvande55 View Post
I was one of the early adopters of CFL bulbs. They cost about $18 and were bulky and heavy. But if used more than four hours a day they were economical even then. First put them in hard to reach areas because I didn't want to change them often. I may be wrong, but LED bulbs have additional advantages: they can be dimmed, and frequent switching doesn't hurt them. They are currently more expensive than CFL bulbs, but these advantages will give CFL a good run for the money.

$18 for a CFL bulbs? I think it is not cheap,what is the power consumption of your CFL? A 9w LED bulb for residential use costs $10 in our factory.Of course,LEDs are more energy saving,they emit little heat and no mecury at all.
Reply With Quote Quick reply to this message
 
Old 07-31-2010, 11:51 PM
 
Location: China
10 posts, read 13,949 times
Reputation: 13
Quote:
Originally Posted by PeterRabbit View Post
I use LEDs in my landscape lighting. The old type of bulbs were 4 watts I think and they don't last long. The LEDs I got are 1 watt or less. LEDs are also being used for some reef tanks/aquariums but they are very expensive and nobody knows the long term results yet.

Hi PeterRabbit,I am glad to hear you have started using LEDs.Do you recognize the light is more brighter now? The light efficiency of LED is much better than conventional lights.
Reply With Quote Quick reply to this message
 
Old 08-01-2010, 12:05 AM
 
Location: China
10 posts, read 13,949 times
Reputation: 13
Quote:
Originally Posted by atlantagreg30127 View Post
I have a LED bulb I've tried in a side night-lamp in the living room. Gives out the equal of 25 watts of light. Kind of a tube lined with LED bulbs. It's ok but the light isn't 100% uniform and it cost something like $15 (but it does only use 1 watt of power). I have also tried one of the outdoor LED security bulbs that Costco sells - it was $14 for one bulb and to be honest, it's not nearly bright enough. I think it puts out the equal of 40 watts and uses 2 watts or something.

I see the potential for these things if they're refined a lot more. On one hand, they come on instantly, use almost no power, and you can use dimmers with them. They also don't have any kind of "flicker" to them - most don't see the flicker of CFL bulbs, but supposedly it's there, and can cause headaches with some people especially when using LCD computer screens... LEDs don't have this. But on the down side, they're wayyyyyy too expesive, put out a blue(ish) type of light, and don't last as long as they're advertised to last, generally.

Once they iron out the details, I'm sure they'll become more common. Right now they're a novelty.


Since you say the light is not uniform,I can guess what kind of lamp you are using.And aslo I guess your bulb is not well-know brand or at least it is not from a big and qualified company.
Another advantage LEDs have just as you mentioned is they do not flick while conventional lights do have even though it is not obvious.
Reply With Quote Quick reply to this message
 
Old 08-01-2010, 12:12 AM
 
Location: China
10 posts, read 13,949 times
Reputation: 13
Quote:
Originally Posted by ShadowBat View Post
LED's are starting to make their way into the market here, though slowly. I've seen them used in flashlights and various small lamps. I work in the automotive industry and notice that many are starting to use them for brake lights. And the new Audi's use them as accent lights too. I know that they're more "green", but I just don't like how they light up a room. I still prefer the old school incandescent bulbs. If they can get LED's to look more natural, I'm on board!

Hi,that is maybe you get used to the light of incandescent bulbs and feel the LED's light is a little bit unnatural.LEDs have warm,white and natural colors up to the different color temperature.
Reply With Quote Quick reply to this message
 
Old 08-01-2010, 12:15 AM
 
Location: roaming gnome
12,391 posts, read 24,562,047 times
Reputation: 5662
Quote:
Originally Posted by Levis Feng View Post
Hi,do you mean the things look different from the real color they have? Professionally speaking,this is called color instruction.This maybe is another disadvantage now LED lights face,and we are now solving it.I believe CRI will be improved in the near future.
Yes that is what I mean. We have halogen flood lights. Also have a lightbox for jewelry/sculptures/prints in order to photograph them correctly web publishing.

Last edited by grapico; 08-01-2010 at 12:24 AM..
Reply With Quote Quick reply to this message
 
Old 08-01-2010, 03:14 PM
 
Location: Pittsburgh, USA
3,133 posts, read 8,334,516 times
Reputation: 1085
Quote:
Originally Posted by Levis Feng View Post
Hi PeterRabbit,I am glad to hear you have started using LEDs.Do you recognize the light is more brighter now? The light efficiency of LED is much better than conventional lights.
I use some colored LEDs in my outside lights and they appear brighter than the old white bulbs they replaced. I also have one that changes colors every 15 seconds. For landscape lighting sets the bulbs nearly cost the same now and are much cheaper on eBay. The electrical savings is minor but I can run 10 times more lights off the same transformer using LEDs.

I'll use them whenever it's practical. I bought a 1W nightlight and took it back to Lowes because the bulb gave off no light and you could barely see it.

Guys who buy them to light their reeef tanks don't use many bulbs and say they're so bright it's not good to look at them. They can't capture the brilliance in a photo and they are using 1W Cree something bulbs. CFL bulbs give off so much heat that an expensive chiller is often needed or fans to cool a fish tank. The LEDs are also manufactured to match natural daylight like 10,000 Kelvin so it depends what you buy what color the bulb will look like.
Reply With Quote Quick reply to this message
 
Old 08-03-2010, 06:27 AM
 
12,296 posts, read 15,190,901 times
Reputation: 8108
Quote:
Originally Posted by Levis Feng View Post
$18 for a CFL bulbs? I think it is not cheap,what is the power consumption of your CFL? A 9w LED bulb for residential use costs $10 in our factory.Of course,LEDs are more energy saving,they emit little heat and no mecury at all.
This was about 20 years ago. Today they are only a dollar or two, much lighter and smaller.
Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.


Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:

Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > U.S. Forums > General U.S.
Follow City-Data.com founder on our Forum or

All times are GMT -6.

2005-2019, Advameg, Inc. · Please obey Forum Rules · Terms of Use and Privacy Policy · Bug Bounty

City-Data.com - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 - Top