foglight assault - Page 3

MotherNatureVer2 · 30-07-2010, 03:26 PM

Quote:

Originally Posted by bfiipursuit

I do approx 5000 kms a month, highways, country, night and day time and the cars that I find worse are 4wds towing trailers with incorrectly positioned headlights that blind me, or the numb nuts who drive around and forget to dip high beam. Lucky for me i have 530 watt of light on my XR6 now and can easily give a few arrogant people a nice suprise.

Foglights dont bother me, having said that on the FG falcon they are that dull and useless i never turn mine on unless its early morning and it is actually foggy so people can see them below the fogline.

Another thing htat drives me insane is these nob truck drivers that have 200 LEDS all over their trucks, some of the LEDs they use are more intense then headlights and blind you / are a huge distraction.. yet the RTA / Police do nothing about them.

Your also in a truck at a seat height a lot higher than a normal sedan...... so many variants to this discussion.....

geckoGT · 30-07-2010, 03:28 PM

Quote:

Originally Posted by MotherNature

OK so maybe I didnt explain the fact that extra amounts of lighting at any wattage will increase the amount of light being shown from the front of a vehicle.

In explaination, what happens when we light 1 candle. There is light...... now add another candle ..... there is double the light .......

Now bear with me ...... both candles emit the same light power individually but when you have two together they double the amount of light ......

Getting my drift ??

It is not the fact that they are set lower on the vehcile. It is not the fact that they are 'only' 50w.

The fact is that there are extra lights there that when used in a totally dark environment it illuminates more than what is seen in the city.

Sorry for those who understand this .... I actually thought it was not that hard.....

Only if the radiation from the light source is projected on the same plane. If you have 2 torches of equal power, both aimed in the same place you will get brighter light. If you lower one torch to illuminate lower than the other, you will not get more light as each will only illuminate the area it is aimed.

Fog lights are not aimed to the same level low beams are and in fact are aimed a lot lower, that is the idea so they illuminate under the fog without bouncing back. If you don't believe me have a look at a B series with standard adjustment and bulbs, the fog lights only illuminate 20m in front of the front bar. If they were not the light would bounce back off fog and they would be no more effective than low beam. Of course this is talking about correctly adjusted fog lights.

MotherNatureVer2 · 30-07-2010, 03:29 PM

On a final note to this discussion .... I will bow out after this.....

So many are saying that spot/driving lights/bright blue lights are so much worse & yes I agree on that totally......

This topic is about the fog lights & this is what I am discussing.

Maybe I am less light tollerant than some ..... the fact is it is illegal ........ end of story!!

scoupedy · 30-07-2010, 03:30 PM

Quote:

Originally Posted by MotherNature

OK so maybe I didnt explain the fact that extra amounts of lighting at any wattage will increase the amount of light being shown from the front of a vehicle.

In explaination, what happens when we light 1 candle. There is light...... now add another candle ..... there is double the light .......

Now bear with me ...... both candles emit the same light power individually but when you have two together they double the amount of light ......

Getting my drift ??

It is not the fact that they are set lower on the vehcile. It is not the fact that they are 'only' 50w.

The fact is that there are extra lights there that when used in a totally dark environment it illuminates more than what is seen in the city.

Sorry for those who understand this .... I actually thought it was not that hard.....

OMG don't get to technical on them - also reflectors can add/reduce brightness (usually brighter as why would you have them) ever noticed how much darker it is with just one headlight? now just imagine what double looks like

FACT IS ONLY ONE SET OF LIGHTS IN BUILT UP AREAS REGARDLESS OF TYPE/USE (unless) FOGGY

**GasoLane** · 30-07-2010, 03:31 PM

Quote:

Originally Posted by bfiipursuit

Another thing htat drives me insane is these nob truck drivers that have 200 LEDS all over their trucks, some of the LEDs they use are more intense then headlights and blind you / are a huge distraction.. yet the RTA / Police do nothing about them.

Unfortunately they are legal, I hate them as well.

Do what I do. Grab the microphone and make comments like...

#1...Tell them it's too early/late for Christmas lights.
#2...Sing jingle bells.
#3.. Comment that it just another case of the lights being brighter than the Driver.

Do not comment if you have children in the Truck/Car with you, they might learn some new, not nice, words with the reply

scoupedy · 30-07-2010, 03:32 PM

Quote:

Originally Posted by geckoGT

Only if the radiation from the light source is projected on the same plane. If you have 2 torches of equal power, both aimed in the same place you will get brighter light. If you lower one torch to illuminate lower than the other, you will not get more light as each will only illuminate the area it is aimed.

Fog lights are not aimed to the same level low beams are and in fact are aimed a lot lower, that is the idea so they illuminate under the fog without bouncing back. If you don't believe me have a look at a B series with standard adjustment and bulbs, the fog lights only illuminate 20m in front of the front bar. If they were not the light would bounce back off fog and they would be no more effective than low beam. Of course this is talking about correctly adjusted fog lights.

some physics for you - if you can see the light then light is ammitting in your direction and therefore adding to the overall brightness

geckoGT · 30-07-2010, 03:38 PM

Quote:

Originally Posted by scoupedy

some physics for you - if you can see the light then light is ammitting in your direction and therefore adding to the overall brightness

Incorrect, if you shine a torch with a focussed beam at a 45 degree angle from you, can you suddenly not see the torch at all? Will it dazzle you, probably not. Now focus the beam right in your eyes.

The focus of the beam greatly affects the intensity of the light but there is still light emitted at other angles meaning you can see it without it adding to the intensity causing it to blind you. Some physics for you.

Smoke Pursuit · 30-07-2010, 03:40 PM

Quote:

Originally Posted by MotherNature

Your also in a truck at a seat height a lot higher than a normal sedan...... so many variants to this discussion.....

I dont drive trucks... I let other people do that!! I drive an XR6 ute 99% of the time.

scoupedy · 30-07-2010, 03:44 PM

Quote:

Originally Posted by geckoGT

Incorrect, if you shine a torch with a focussed beam at a 45 degree angle from you, can you suddenly not see the torch at all? Will it dazzle you, probably not. Now focus the beam right in your eyes.

The focus of the beam greatly affects the intensity of the light but there is still light emitted at other angles meaning you can see it without it adding to the intensity causing it to blind you. Some physics for you.

Hmm interesting that distintion in physics must have arsed that,.....

so fog lights are aimed at 45 degrees? they are aimed forward and alot of light is reflected up (don't deny this as this is how they are designed so you can see when there is actually fog around) especially after rain

geckoGT · 30-07-2010, 03:47 PM

Quote:

Originally Posted by scoupedy

Hmm interesting that distintion in physics must have arsed that,.....

so fog lights are aimed at 45 degrees? they are aimed forward and alot of light is reflected up (don't deny this as this is how they are designed so you can see when there is actually fog around) especially after rain

The reference to 45 degrees was purely to illustrate a point, not to be taken literally in reference to fog lights. Don't worry about it, you seem to have missed the point.

RG · 30-07-2010, 03:48 PM

Quote:

Originally Posted by scoupedy

Hmm interesting that distintion in physics must have arsed that,.....

so fog lights are aimed at 45 degrees? they are aimed forward and alot of light is reflected up (don't deny this as this is how they are designed so you can see when there is actually fog around) especially after rain

I'll deny it, as it is untrue. The truth is quite the opposite in fact.

http://en.wikipedia.org/wiki/Automot...ront_fog_lamps

Quote:

Front fog lamps provide a wide, bar-shaped beam of light with a sharp cutoff at the top, and are generally aimed and mounted low.[10][11][12] They may be either white or selective yellow. They are intended for use at low speed to increase the illumination directed towards the road surface and verges in conditions of poor visibility due to rain, fog, dust or snow. As such, they are often most effectively used in place of dipped-beam headlamps, reducing the glareback from fog or falling snow, although the legality varies by jurisdiction of using front fog lamps without low beam headlamps.

Wikipedia agrees with me.

scoupedy · 30-07-2010, 03:55 PM

Quote:

Originally Posted by RG

I'll deny it, as it is untrue. The truth is quite the opposite in fact.

http://en.wikipedia.org/wiki/Automot...ront_fog_lamps

Wikipedia agrees with me.

If its not refected up then how does it get to your eyes? or ours

quote wikipedia
light is like water - picture a hose spraying water onto your windscreen add another hose = more water, spray another hose at the ground in from of the car still more water as it will bounce off the road onto the windscreen
So does having two hoses spraying your windscreen and two spraying in front of you (from the other car not yours) more or less water or the same?

geckoGT · 30-07-2010, 03:57 PM

Quote:

Originally Posted by scoupedy

If its not refected up then how does it get to your eyes? or ours

quote wikipedia
light is like water - picture a hose spraying water onto your windscreen add another hose = more water, spray another hose at the ground in from of the car still more water as it will bounce off the road onto the windscreen
So does having two hoses spraying your windscreen and two spraying in front of you (from the other car not yours) more or less water or the same?

If a hose is not spraying in your face, can you still see the water?

scoupedy · 30-07-2010, 03:59 PM

huh not sure did you study Physics?

geckoGT · 30-07-2010, 04:04 PM

Quote:

Originally Posted by scoupedy

huh not sure did you study Physics?

You are not getting the point and I am not wasting any more time on this.

fairmont1998 · 30-07-2010, 04:23 PM

I think this thread has run its course.