• LEDs 'offering a brighter future'
    43 replies, posted
[url]http://www.bbc.co.uk/go/rss/int/news/-/news/science-environment-16199552[/url]
The thing is high powered LEDs MUST have heatsinking, and proper airflow. If they don't, they get hot, dim, and have a short life. Hopefully these manufacturers provide adequate heatsinks.
I heard the opposite. They had problems with traffic lights when they switched to LED's because they didn't melt the snow on them.
[QUOTE=garry;33749326]I heard the opposite. They had problems with traffic lights when they switched to LED's because they didn't melt the snow on them.[/QUOTE] That's because they are more energy efficient, meaning that most of the energy gets turned to light - and not to heat like it is now.
So keep traffic lights as they are and use LEDs for residential areas?
I'm not sure about ya'll, but a specific light technology does not have an effect on how safe I feel. I don't care, incandescant, flourescant, LED, open fire, as long as I can see clearly I get the same safe sensation when in a public place. If they want to use these in public places, go nuts. I'd use 'em in my house, too, if I could A: find some and B: run them on dimmer switches.
I have some led lights in my apartment, and they all just go after a month or two. I'm not sure how many times I've had to change them now. They usually just go out while they're on, and not when I'm turning them on or off. Maybe it's just bad luck, a bad brand or bad electricity.
[QUOTE=garry;33749326]I heard the opposite. They had problems with traffic lights when they switched to LED's because they didn't melt the snow on them.[/QUOTE] Those wouldn't be very high-powered LEDs though? These LEDs need to light up a room, but the LEDs in traffic lights just need to be visible when you look at them
[QUOTE=smurfy;33751735]Those wouldn't be very high-powered LEDs though? These LEDs need to light up a room, but the LEDs in traffic lights just need to be visible when you look at them[/QUOTE] Actually they need to be stupidly bright. Being able to see a traffic light is a safety issue and they have to be clearly visible regardless of outside factors. As a result, they need to be stupidly powerful. Room lights? LED models are two to four watts.
[QUOTE=CapsAdmin;33751017]I have some led lights in my apartment, and they all just go after a month or two. I'm not sure how many times I've had to change them now. They usually just go out while they're on, and not when I'm turning them on or off. Maybe it's just bad luck, a bad brand or bad electricity.[/QUOTE] Are you sure they're LED lightbulbs? I can't see any LEDs dying that quickly unless the manufacturer sucks and other components are dying first.
Lightbulbs are actually part of the heating in a room and it's not a neglible part.
[QUOTE=The golden;33752858]Your average incandescent and CFL bulb doesn't do much other than heat the lampshade/socket. You would probably have to run like 20 bulbs side-by-side for several hours before you feel even a degree of difference in anything other than closet-sized room.[/QUOTE] They warm up rooms enough to be used to avoid having your pipes get frozen in the cellar rooms.
[QUOTE=TestECull;33750974]I'm not sure about ya'll, but a specific light technology does not have an effect on how safe I feel. I don't care, incandescant, flourescant, LED, open fire, as long as I can see clearly I get the same safe sensation when in a public place. If they want to use these in public places, go nuts. I'd use 'em in my house, too, if I could A: find some and B: run them on dimmer switches.[/QUOTE] a good example of why LED lights are safer in cars then incandescent, what you do is find a person with a car with normal lights, and a trailer with LED brake lights, connect the trailer to the car, and watch how much faster you notice the brake lights on the trailer then on the car, since normal lights have a heat up time of like half a second, while LEDs are instant or near instant
I fucking hate LEDs, i like the warm color regular light bulbs emit That blue, bright, hospital-like light sucks.
Unless there are black widows hiding in the shadows I don't feel more secure with the LED lighting.
They tried LED lamp posts near to me and they hardly ever work and they didn't light up anything that then the top of the lamp post.
[QUOTE=The golden;33754923]Tell them to put LED bulbs inside and not fireflies. Seriously. A good LED bulb is so bright it's like they made it by using chunks of the sun.[/QUOTE] They took them down and bought new ones as they had already sold the old lamps.
[QUOTE=DrogenViech;33753878]I fucking hate LEDs, i like the warm color regular light bulbs emit That blue, bright, hospital-like light sucks.[/QUOTE] those arn't LED lights, those are cheap HID lights that suck, or HIDs using really annoying colour temperatures (specifically 10000k and 12000k), good quality HID lights dont have that issue, but all those blue and purple HID lights are just awful, actualy, almost all aftermarket HID lights are awful and should be illegal, also, the brightest HID lights are the 4300k ones, the ones that are blue and purple are actually the least bright
LEDs are really amazing. They even use less power than compact fluorescent bulbs and don't have dangerous mercury in them.
no shit LEDs offer a brighter future, they give off light.
If we all use LED lights, how will we heat our easy bake ovens? [img]http://i.imgur.com/jpJkg.jpg[/img]
[QUOTE=Cmx;33769442]If we all use LED lights, how will we heat our easy bake ovens? [img]http://i.imgur.com/jpJkg.jpg[/img][/QUOTE] [img]http://www.chinawholesaletown.com/wholesale-Hair-Dryer---Electrical-Dryer_4154750424d44e785d96620web_up_file.jpg[/img]
So far all the LED lightbulbs I have seen were both expensive as hell ($20 a bulb? I don't care if it can last 25 years, that's half a tank of gas) and they make rooms feel even colder and gloomy than Natural Light CFL bulbs. I'll be sticking with Tungsten Filament and Halogen for a while.
You guys are dumb, you can get LED in your preferred light temperature, too. If you don't like the cool ones, there are ones to mimic the yellow light of the normal bulbs.
[QUOTE=garry;33749326]I heard the opposite. They had problems with traffic lights when they switched to LED's because they didn't melt the snow on them.[/QUOTE] I'm not sure what they did here, my town switched to LED traffic lights 2 or 3 years ago and there haven't been any problems in the winter. The entire enclosure was replaced, so that might have something to do with it. Newer ones might be shaped in a way that doesn't accumulate snow or something.
I bought a 3 LED "bulb" instead of a halogen one a while ago. It was three or four times as expensive, but I thought I'd give it a try. I wrote the date on it too so I'll see how long it'll hold up. Not to mention just how bright it is using up a fraction of the energy other ones use
[QUOTE=MIPS;33769683]($20 a bulb? I don't care if it can last 25 years, that's half a tank of gas)[/QUOTE] what the fuck
[QUOTE=Catdaemon;33774079]what the fuck[/QUOTE] He is a retard.
[QUOTE=DrogenViech;33753878]I fucking hate LEDs, i like the warm color regular light bulbs emit That blue, bright, hospital-like light sucks.[/QUOTE] I don't like when people refer to red colours as warm and blue colours as cold. The only reason we do that is because we associate red colours with things like fire (and hence believe red to be inherently 'warm'), and we associate blue colours with things like water and ice (which are generally cold). It's all just psychological conditioning. If anything BLUE is the hotter colour. Did you/do you do chemistry in school? Ever used a Bunsen burner? Blue fire is a LOT hotter and more dangerous than red fire (well, orange/yellow fire, whatever). The yellow flame is even called the 'safety flame'. [editline]18th December 2011[/editline] By definition blue light is hotter. It contains more energy than lights on the red end of the spectrum.
I've got all LED downlights in my house now. They use 4w compared to the 11w energy saving ones the government recommended and they were only $8-10 a bulb and a hell of alot brighter and they go to max brightness instantly you don't have to wait for them to heat up.
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