Author Topic: Biden admin moving forward with light bulb bans in coming weeks  (Read 18280 times)

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Online SiliconWizard

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Re: Biden admin moving forward with light bulb bans in coming weeks
« Reply #200 on: April 15, 2023, 09:52:51 pm »
Don't worry, AI will save us.
 

Offline vk6zgo

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Re: Biden admin moving forward with light bulb bans in coming weeks
« Reply #201 on: April 16, 2023, 12:33:37 am »
Whether it's actually useful in full daylight (unless very cloudy) is questionable, but there are some countries where not only it is legal, it is mandatory.

It can be simply tested whilst on a country road during a sunny day.
I found no difference in visibility between vehicles with their lights on or off.
Whether it is any more effective in heavy traffic I don't know, but I doubt it.
The original idea came from Scandinavian countries where it is dark for most winter days.
You don't have bad weather? Running lights are pretty much irrelevant on a bright sunny day out in the open. Even on one of those days you only need to go under a big underpass, and the lights start to be effective. In bad weather they are a real boon.
 

If we have bad weather, it is "slam you up against the wall & beat you up" type of weather.
Most of the rest of the time, it is reasonably sunny between showers, or even normal storms.
Those very dark, overcast days, where it looks like late afternoon all day are not near as common as in UK winters.

When visibility is bad, people will turn on their proper headlights.
"Underpass"? ---We turn our lights on if we go through a tunnel, but an underpass would have to be seriously big to need to do so.
 

Offline strawberry

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Re: Biden admin moving forward with light bulb bans in coming weeks
« Reply #202 on: April 16, 2023, 10:55:57 am »
if avg LED lasts 5years , or ~5000h , or avg ~3.3h/d (from experience)

where 50 000h should last for 50y  :-DD why their numbers became more modest

 

Offline Nusa

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Re: Biden admin moving forward with light bulb bans in coming weeks
« Reply #203 on: April 16, 2023, 06:19:52 pm »
if avg LED lasts 5years , or ~5000h , or avg ~3.3h/d (from experience)

where 50 000h should last for 50y  :-DD why their numbers became more modest

Cite your source of numbers if you want to be believable, rather than an undefined "they". I believe your numbers are not correct, at least for quality products which can last the life of the vehicle.

But in general, the 50K number is about JUST the LED, not the associated electronics that require sufficient heatsinking. Heat is what shortens the life of the electronics. Cheap aftermarket products often skimp on both the quality of components and the heatsinks.
 
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Offline coppice

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Re: Biden admin moving forward with light bulb bans in coming weeks
« Reply #204 on: April 16, 2023, 07:23:20 pm »
"Underpass"? ---We turn our lights on if we go through a tunnel, but an underpass would have to be seriously big to need to do so.
Underpasses can be hundreds of metres long, especially when 2 roads cross in a gentle X pattern, and someone is underneath for quite a distance. They seem to like doing that in parts of America, and your sat nav gets confused because you appear to be on the right road, when you are really on the one above or below.
 

Offline strawberry

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Re: Biden admin moving forward with light bulb bans in coming weeks
« Reply #205 on: April 16, 2023, 07:58:26 pm »
if avg LED lasts 5years , or ~5000h , or avg ~3.3h/d (from experience)

where 50 000h should last for 50y  :-DD why their numbers became more modest

Cite your source of numbers if you want to be believable, rather than an undefined "they". I believe your numbers are not correct, at least for quality products which can last the life of the vehicle.

But in general, the 50K number is about JUST the LED, not the associated electronics that require sufficient heatsinking. Heat is what shortens the life of the electronics. Cheap aftermarket products often skimp on both the quality of components and the heatsinks.
meant household bulbs . usually not near to automotive environment temperatures
I bought one E27 PAR Osram in ~2010 for ~15eur top price at the time. It still works (avg daily usage ~0.5h/d ) not much data but dozen cheap had been repaired (failed : capacitors ,LED)
 

Offline Zero999

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Re: Biden admin moving forward with light bulb bans in coming weeks
« Reply #206 on: April 16, 2023, 09:01:49 pm »
"Underpass"? ---We turn our lights on if we go through a tunnel, but an underpass would have to be seriously big to need to do so.
Underpasses can be hundreds of metres long, especially when 2 roads cross in a gentle X pattern, and someone is underneath for quite a distance. They seem to like doing that in parts of America, and your sat nav gets confused because you appear to be on the right road, when you are really on the one above or below.
I don't have a car, but my dad's car does automatically adjust the lighting, when going through a tunnel. I don't know if there's a time delay, or a low pass filter on the sensor, to prevent it flashing, whilst going under a bridge.
 

Offline coppice

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Re: Biden admin moving forward with light bulb bans in coming weeks
« Reply #207 on: April 16, 2023, 09:24:37 pm »
"Underpass"? ---We turn our lights on if we go through a tunnel, but an underpass would have to be seriously big to need to do so.
Underpasses can be hundreds of metres long, especially when 2 roads cross in a gentle X pattern, and someone is underneath for quite a distance. They seem to like doing that in parts of America, and your sat nav gets confused because you appear to be on the right road, when you are really on the one above or below.
I don't have a car, but my dad's car does automatically adjust the lighting, when going through a tunnel. I don't know if there's a time delay, or a low pass filter on the sensor, to prevent it flashing, whilst going under a bridge.
I think any modern car with automated lights does this. As I enter any darkish place my LCD dashboard switches from day mode (bright background) to night mode (dark background). Assuming I have the lights in the automatic mode they switch too. If they have been left in manual, the dashboard gives a warning as things get dark.
 


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