LED Trend: Right or Wrong ?

[Viru]

That is quite a large dark spot for the Low beam, I'm disappointed that M&M could allow such a poorly designed headlight unit to be put into one of their flagship vehicles!

Liked your solution though, if I'm not mistaken those lamps are mounted behind the grille?

 

[bhvm]

That is quite a large dark spot for the Low beam, I'm disappointed that M&M could allow such a poorly designed headlight unit to be put into one of their flagship vehicles!

Liked your solution though, if I'm not mistaken those lamps are mounted behind the grille?

yes, the lamps are behind the grille. they're to totally covert when off. also steal proof!

 

[Viru]

yes, the lamps are behind the grille. they're to totally covert when off. also steal proof!

Sounds good!

And they're wired to a separate switch inside the car? Didn't it affect the warranty?

 

[bhvm]

Sounds good!

And they're wired to a separate switch inside the car? Didn't it affect the warranty?

They're wired up to The stock Fog lamp relay. So just as stock Fog lamps come on, These babies do as well! The install was totally DIY, NO-Splice- No Cut approach and does not affect the warranty in any way.

 

[Viru]

They're wired up to The stock Fog lamp relay. So just as stock Fog lamps come on, These babies do as well! The install was totally DIY, NO-Splice- No Cut approach and does not affect the warranty in any way.

Ok, but isn't this likely to put a lot of load on the electrical supply for the fogs? Could be risking a fire if the wires heat up too much and the insulation melts.

Also, that would make your foglights useless in foggy/rainy conditions!

 

[ram123]

LED light

Pros

1) Consumes very less energy
2) Has more light hours

Cons

1) Expensive
2) Heat dissapation
3) (Very important) Light glare and focus will blind the persons temporarly
I think the glare and focus is very dangerous for incoming vehicles and should only be make legal after proper tests. As focus is very high it will cause temporary blindness to incoming vehicles

 

[sethumurugan]

LED light

Pros

1) Consumes very less energy
2) Has more light hours

Cons

1) Expensive
2) Heat dissapation
3) (Very important) Light glare and focus will blind the persons temporarly
I think the glare and focus is very dangerous for incoming vehicles and should only be make legal after proper tests. As focus is very high it will cause temporary blindness to incoming vehicles

@Viru, have noted that this point is valid and supports my statement on LED is not good for eyes. I think this could be the reason which we were talking about.

 

[Viru]

@Viru, have noted that this point is valid and supports my statement on LED is not good for eyes. I think this could be the reason which we were talking about.

Yes, basically this is also saying that it is because LEDs behave as a point source of light so it's very intense.

I guess we have found our answer

 

[Kichu]

Viru,

I liked your way to thinking.
But here the problem is not because of the reason that you have said("LEDs behave as a point source of light so it's very intense")
Not just about the LEDs, any light source which is very intense in brightness can be the reason for damaging the eyes and again it should not be necessary to be a point source.
Because human eyes are not actually mend for directly looking into the light source, instead just to receive less intensive reflected lights from the objects.

According to the science, researchers say LED produce high levels of radiation in the ‘blue band’ of the light spectrum, which can cause damage over time. That is the reason why LEDS are said to be harmful.

*About Blueband and spectrum can be easily learned doing some google'ing.

 

[bhvm]

forgot one thing. since day 1,I've installed a kill switch that bypasses the Led completely. I use this kill switch for city and single lane drives.

today I've driven up to Bombay and am full of praises for my led setup. they safe and brilliant on 4 Lane roads with dividers .

 

[Viru]

forgot one thing. since day 1,I've installed a kill switch that bypasses the Led completely. I use this kill switch for city and single lane drives.

today I've driven up to Bombay and am full of praises for my led setup. they safe and brilliant on 4 Lane roads with dividers .

Sounds good! I hope you only used them when there was no oncoming traffic to blind

Viru,

I liked your way to thinking.
But here the problem is not because of the reason that you have said("LEDs behave as a point source of light so it's very intense")
Not just about the LEDs, any light source which is very intense in brightness can be the reason for damaging the eyes and again it should not be necessary to be a point source.
Because human eyes are not actually mend for directly looking into the light source, instead just to receive less intensive reflected lights from the objects.

According to the science, researchers say LED produce high levels of radiation in the ‘blue band’ of the light spectrum, which can cause damage over time. That is the reason why LEDS are said to be harmful.

*About Blueband and spectrum can be easily learned doing some google'ing.

Actually, let me correct that. A filament bulb comes with a glass cover (Usually Quartz glass) which helps to dissipate the light from the filament so as to reduce glare, whereas most LEDs are not fitted with this. Meanwhile, a typical LED provides a high light output despite it's small size, meaning its perceived intensity is much higher than an incandescent or even fluorescent light source. Hence the invention of the COB chip.

The concept of humans only being meant to use reflected light is for extremely high intensity sources like the sun, which produces an immense amount of light energy but appears relatively small due to it's distance from the earth, which also reinforces the point in the above paragraph.

The blue band is a very basic optical concept, referring to the higher frequencies in the light spectrum (Which are perceived as the colour range of cyan to violet by our eyes). These rays are very high energy waves, as we all know energy of a wave is directly proportional to its frequency, which is why they are said to cause retina damage after prolonged exposure.

 

[Kichu]

Hi Viru,

Still you did't get the point. Let me explain once again.

You do only consider LED lights as it is coming from a small point source, that is why you feel difficulty in understanding. But what about the LED lights which spreads very well?
Viru, It need not to be a point source. Even if those LED light spreads better than our traditional incandescent bulbs still it is considered to be harmful, why????because it produces high levels of radiation in the blueband of the light spectrum.
Consider a 1watt 100lumens of LED light emitting from a small source of surface area and a 1watt 100lumens of LED light emitting from a 10cm sq surface area.
Here according to you the 2nd led with 10cm sq surface area of source is not going to cause any harm since it is not from a point source and its intensity is less comparing to the other, isn't it? What I'm saying is in the case of LED, irrespective of its 'light source surface area' it is going to harm our eyes since it produces high levels of radiation. NOt just the LEDs, any light source with high intensity of light is harmful for our eyes. Eg:- SPOTLIGHTS using filament bulbs or fluorescent bulbs or HID. Looking in to the Spotlights are also going to harm our eyes.

I will give you some examples for getting better idea.
Consider our electronic devices with LED displays. For example Laptop/desktop screens, Mobile screen etc.
Do you think the light coming from these displays are just like the lights coming from a normal 5 or 8mm LED panel???? definitely not isn't it.? Because light coming from the LED display spreads much better than those 5 or 8mm LEDs. Then why LED screens are said to be harmful? Why LED screens are said to be more harmful for eyes than those LCD screens with the 'same amount of brightness'? because of the same reason, LED produces high levels of radiation in the blueband of the light spectrum.
So here the matter is not about amount for light that comes from the led or the surface area(Yes, they do matters, But here in the case of LED this is not the actual problem, its the radiation). or else the LCD displays with same amount of brightness should also harm our eyes just like the LED displays do. But LEDs displays are said to be more harmful.

I request you to read those lines written in bold if you are still confused.

Cheers.

 

[Prads]

Interesting thread,

My knowledge is quite rusty as i had looked into it as a business motive but the advancements are fast that it did not make sense to venture into it. As far as i know LED's come in different ranges & they are advancing at crazy levels,
we cannot use common LEDs for household use they usually club the LEDs made from the same silicon foil to get uniform lighting & i believe there are quality levels for the silicon chip used,thats why some household leds from reputed brands are on the expensive side.
Also other type of expensive Leds i have come across are the Marine aquarium LEDs,they are quite expensive as they imitate natural light for aquariums which otherwise was only possible from Metal Hallide lights & they usually consumed 100watts.
As for the LED headlights that are coming on highend Audi(not DRL) if you take a closer look at them when in operation they use reflectors on them to bounce the led lights,cos led is a small bright source of light (as many mentioned above comments say)which can blind people as some aftermarket DRLs do.
I looked at them on a friends A8 & have to say the results are disappointing,they loose their sheen after sometime,i feel HIDs are here to stay for quite some time. Yes if am not wrong these LED units cost above 1.5 lakhs to replace for a single headlight.

Unfortunately in the common sector Mercury free LEDs are still not that popular cos of price difference.They kinda often the green side of the LED.


I have a question which i would be glad if answered on Mercedes brake lights ,if you take a closer look you will notice a strip acts as brake light,they are certainly not LEDs,what are they???

 

[bhvm]

LED light

Pros

1) Consumes very less energy
2) Has more light hours

Cons

1) Expensive
2) Heat dissapation
3) (Very important) Light glare and focus will blind the persons temporarly
I think the glare and focus is very dangerous for incoming vehicles and should only be make legal after proper tests. As focus is very high it will cause temporary blindness to incoming vehicles

@Viru, have noted that this point is valid and supports my statement on LED is not good for eyes. I think this could be the reason which we were talking about.

Yes, basically this is also saying that it is because LEDs behave as a point source of light so it's very intense.

I guess we have found our answer]

Partly true, But thats due to unfocused, Bare LEDs. LEDs under lenses shall reduce glare and put light where its useful (eg. on road)

Viru,

I liked your way to thinking.
But here the problem is not because of the reason that you have said("LEDs behave as a point source of light so it's very intense")
Not just about the LEDs, any light source which is very intense in brightness can be the reason for damaging the eyes and again it should not be necessary to be a point source.
Because human eyes are not actually mend for directly looking into the light source, instead just to receive less intensive reflected lights from the objects.

According to the science, researchers say LED produce high levels of radiation in the ‘blue band’ of the light spectrum, which can cause damage over time. That is the reason why LEDS are said to be harmful.

*About Blueband and spectrum can be easily learned doing some google'ing.

Well said mate. Even HID and high wattage halogens (those 100W blinders on trucks) can cause as much Glare or Worse than the LEDs.

Sounds good! I hope you only used them when there was no oncoming traffic to blind ]


Actually, let me correct that. A filament bulb comes with a glass cover (Usually Quartz glass) which helps to dissipate the light from the filament so as to reduce glare, whereas most LEDs are not fitted with this. Meanwhile, a typical LED provides a high light output despite it's small size, meaning its perceived intensity is much higher than an incandescent or even fluorescent light source. Hence the invention of the COB chip.

The concept of humans only being meant to use reflected light is for extremely high intensity sources like the sun, which produces an immense amount of light energy but appears relatively small due to it's distance from the earth, which also reinforces the point in the above paragraph.

The blue band is a very basic optical concept, referring to the higher frequencies in the light spectrum (Which are perceived as the colour range of cyan to violet by our eyes). These rays are very high energy waves, as we all know energy of a wave is directly proportional to its frequency, which is why they are said to cause retina damage after prolonged exposure.

1)Definately. I use them on 4 lanes where there are Plant dividers. They completely block the light transmission to oncoming lane

2) Are you actually referring to High colour temperature of LED? any 6000k or above light source is bound to have a lot of higher spectrum energy. HID are particularly worse for these as they generate a lot of Blue-UV light. LED is a clear winner as the Phospohor coating sharply tapers off output above blue wavelengths. LEDs are totally UV- Free light sources.

Hi Viru,

Still you did't get the point. Let me explain once again.

You do only consider LED lights as it is coming from a small point source, that is why you feel difficulty in understanding. But what about the LED lights which spreads very well?
Viru, It need not to be a point source. Even if those LED light spreads better than our traditional incandescent bulbs still it is considered to be harmful, why????because it produces high levels of radiation in the blueband of the light spectrum.
Consider a 1watt 100lumens of LED light emitting from a small source of surface area and a 1watt 100lumens of LED light emitting from a 10cm sq surface area.
Here according to you the 2nd led with 10cm sq surface area of source is not going to cause any harm since it is not from a point source and its intensity is less comparing to the other, isn't it? What I'm saying is in the case of LED, irrespective of its 'light source surface area' it is going to harm our eyes since it produces high levels of radiation. NOt just the LEDs, any light source with high intensity of light is harmful for our eyes. Eg:- SPOTLIGHTS using filament bulbs or fluorescent bulbs or HID. Looking in to the Spotlights are also going to harm our eyes.

I will give you some examples for getting better idea.
Consider our electronic devices with LED displays. For example Laptop/desktop screens, Mobile screen etc.
Do you think the light coming from these displays are just like the lights coming from a normal 5 or 8mm LED panel? definitely not isn't it.? Because light coming from the LED display spreads much better than those 5 or 8mm LEDs. Then why LED screens are said to be harmful? Why LED screens are said to be more harmful for eyes than those LCD screens with the 'same amount of brightness'? because of the same reason, LED produces high levels of radiation in the blueband of the light spectrum.
So here the matter is not about amount for light that comes from the led or the surface area(Yes, they do matters, But here in the case of LED this is not the actual problem, its the radiation). or else the LCD displays with same amount of brightness should also harm our eyes just like the LED displays do. But LEDs displays are said to be more harmful.

I request you to read those lines written in bold if you are still confused.

Cheers.

Nice explanation
1)you are again referring to 'Light guides' They spread the Light evenly on the lens surface and you can't see individual LEDs. LEDs are actually hidden deep inside the housings. Result- Glare free and even LED light

2) Do not agree to your High spectrum/UV say. Do you feel problems working with LED display Mobile or laptop the same way you blame LEDs? If so they should have gone banned a long time ago. Problem is usually inferior lenses/Poor execution of housing and not the LED source itself.

Interesting thread,

My knowledge is quite rusty as i had looked into it as a business motive but the advancements are fast that it did not make sense to venture into it. As far as i know LED's come in different ranges & they are advancing at crazy levels,
we cannot use common LEDs for household use they usually club the LEDs made from the same silicon foil to get uniform lighting & i believe there are quality levels for the silicon chip used,thats why some household leds from reputed brands are on the expensive side.
Also other type of expensive Leds i have come across are the Marine aquarium LEDs,they are quite expensive as they imitate natural light for aquariums which otherwise was only possible from Metal Hallide lights & they usually consumed 100watts.
As for the LED headlights that are coming on highend Audi(not DRL) if you take a closer look at them when in operation they use reflectors on them to bounce the led lights,cos led is a small bright source of light (as many mentioned above comments say)which can blind people as some aftermarket DRLs do.
I looked at them on a friends A8 & have to say the results are disappointing,they loose their sheen after sometime,i feel HIDs are here to stay for quite some time. Yes if am not wrong these LED units cost above 1.5 lakhs to replace for a single headlight.

Unfortunately in the common sector Mercury free LEDs are still not that popular cos of price difference.They kinda often the green side of the LED.


I have a question which i would be glad if answered on Mercedes brake lights ,if you take a closer look you will notice a strip acts as brake light,they are certainly not LEDs,what are they?

You seem to have a lot of half baked info mate.
1)All LEDs are mercury free. White leds use a Blue LED Die of Indium Gallium nitride (InGAin) to Generate Blue Light, this die is then coated with Phosphor to Block harfmul wavelengths and convert the Blue light to White Light. The type and Amount of phosphor will deicide the colour temperature of LED

2)Those funky looking things you see in High End LED products are called 'Light guides' They spread the Light evenly on the lens surface and you can't see individual LEDs. LEDs are actually hidden deep inside the housings. Result- Glare free and even LED light

Let me show some useful links for ALL of you-
http://www.theautomotiveindia.com/f...new-honda-city-white-albus-23.html#post376218

http://www.theautomotiveindia.com/f...16657-led-trend-right-wrong-3.html#post376087

 

[yoscenario2000]

VOILA !!!

When I started this thread, I was not even sure if I would get any replies to this one.

But look at this thread now, this is becaming a ocean of information with the valuable infromation/suggetions/responces from our members.

I am glued to the thread.

Thanks a lot guys, you've made this thread quite interesting and informative.

Keep it up