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TDI Fuel Economy Discussions about increasing the fuel economy of your TDI engine. Non TDI related postings will be moved or removed.

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Old February 9th, 2017, 05:45   #31
jdulle
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So if you are driving a lot at night, it might make sense. It would be small, the difference. But every little thing adds up. Just like with the insight, they did so many things to improve aero and lighten the car. The bottom third of the engine is magnesium. The valve cover gasket is plastic. The hood is carbon fiber. The rear drums are aluminum. I just replaced the license plate lights, and IIRC some running lights on the front of the car with LED. Partly I hate when you go to the auto parts store and they charge 4 or 5$ for 2 tiny bulbs, and the second one sits in the glove box and eventually gets broken. The LEDs will last the life of the car. I would get LRR tires when the ones on there wear out, and inflate to 40psi. They will save more fuel than the LEDs, but it will also be minor. Biggest savings are from driving slower, and the grill block. I have not done the grill block on my tdi because I don't drive it in the winter, but my insight has a full block and the civic has 3/4 blocked off in the winter.
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Old February 9th, 2017, 17:29   #32
eddieleephd
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Originally Posted by turbovan+tdi View Post
Why is it unfortunate? You'd be the first one that cut their bill by 40% changing to LED's. I've done it, my friends have done it and the bill didn't change one bit, or if it did, not enough to notice. 40% is cutting your bill in half, the only way I can see it being done is if you left every light on in the house 24 hours a day.

Either way, glad it worked out for you.
Do you have kids? Yes the lights stay on 90% of the time no matter what you do!

I am a sustainability professional and it is not BS.
If you change from CFL's the difference will not be this dramatic.
However, CFL's use 70% less energy than incandescent's and LED's use 85% less than incandescent's.
The greatest difference in the long run between LED and CFL's are the lifetime of the bulb.
Another great thing about LED bulbs is spectrum availability. Use daylight spectrum and you will see true color!

My bulbs by the way are 4 years old or so.
I recommend getting them at the hardware store when the power company is doing their mandatory subsidization. I got my bulbs for around $3 each Regular $7-$9.

I am all for going to DC lighting throughout the house.
Both CFL's and LED's can operate on DC more efficiently than AC.
This would create an even greater reduction in energy consumption due to lack of conversion, or more correctly stated rectification.

So far as Automotive bulbs goes the design of the vehicle limits greatly the benefit to using LED.
For our VW's, LED headlights are not compatible with the bulb housing.
LED bulbs are only really viable in sockets inside the vehicle and exterior for markers, backup lights (which correct ones would be great), and the license plate lamp.

Power consumption will not be that greatly reduced and the main benefits would be greater illumination and a longer lifetime if you get good quality bulbs.

Just as with any other part on our cars, CHEAP is WORTHLESS!

Use Quality LED bulbs in the right spot and never replace them.
You can use LED with resistors built in if they are quality and they will not negatively affect the experience of driving, however, longer life is the sole benefit!

You will never save enough energy with automotive bulbs to pay for them, however, you may go through few enough bulbs to pay for them.
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Old February 9th, 2017, 17:49   #33
U4ick
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Originally Posted by TDIMeister View Post
I have to call fake news on this one.
Damn......Do you just like to argue? Ha Ha Ha
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Old February 9th, 2017, 18:40   #34
donDavide
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Quote:
Originally Posted by eddieleephd View Post
Do you have kids? Yes the lights stay on 90% of the time no matter what you do!

I am a sustainability professional and it is not BS.
If you change from CFL's the difference will not be this dramatic.
However, CFL's use 70% less energy than incandescent's and LED's use 85% less than incandescent's.
The greatest difference in the long run between LED and CFL's are the lifetime of the bulb.
Another great thing about LED bulbs is spectrum availability. Use daylight spectrum and you will see true color!

My bulbs by the way are 4 years old or so.
I recommend getting them at the hardware store when the power company is doing their mandatory subsidization. I got my bulbs for around $3 each Regular $7-$9.

I am all for going to DC lighting throughout the house.
Both CFL's and LED's can operate on DC more efficiently than AC.
This would create an even greater reduction in energy consumption due to lack of conversion, or more correctly stated rectification.

So far as Automotive bulbs goes the design of the vehicle limits greatly the benefit to using LED.
For our VW's, LED headlights are not compatible with the bulb housing.
LED bulbs are only really viable in sockets inside the vehicle and exterior for markers, backup lights (which correct ones would be great), and the license plate lamp.

Power consumption will not be that greatly reduced and the main benefits would be greater illumination and a longer lifetime if you get good quality bulbs.

Just as with any other part on our cars, CHEAP is WORTHLESS!

Use Quality LED bulbs in the right spot and never replace them.
You can use LED with resistors built in if they are quality and they will not negatively affect the experience of driving, however, longer life is the sole benefit!

You will never save enough energy with automotive bulbs to pay for them, however, you may go through few enough bulbs to pay for them.
Cheaper at costco, got 100s for 1.79, 60s for 1.65
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Old February 9th, 2017, 20:39   #35
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Damn......Do you just like to argue? Ha Ha Ha
Lol.
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Old February 10th, 2017, 06:29   #36
VeeDubTDI
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Originally Posted by eddieleephd View Post
Another great thing about LED bulbs is spectrum availability. Use daylight spectrum and you will see true color!
Don't conflate color temperature and color rendering index. To see true color, you need high CRI. Color temperature is just the tone of the light (warm/cool). Most of the "daylight" LEDs and CFLs you find in places like Home Depot and Lowe's are only ~80 CRI.

There are some daylight spectrum lamps that mimic actual daylight (about 5000K and 98 CRI), but they're pretty expensive and not available at your local hardware store.

You also don't want lights that are too blue/cool at night, as blue light slows natural melatonin production and screws up the body's circadian rhythm.

</offtopic>
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Old February 16th, 2017, 14:11   #37
eddieleephd
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Originally Posted by VeeDubTDI View Post
Don't conflate color temperature and color rendering index. To see true color, you need high CRI. Color temperature is just the tone of the light (warm/cool). Most of the "daylight" LEDs and CFLs you find in places like Home Depot and Lowe's are only ~80 CRI.

There are some daylight spectrum lamps that mimic actual daylight (about 5000K and 98 CRI), but they're pretty expensive and not available at your local hardware store.

You also don't want lights that are too blue/cool at night, as blue light slows natural melatonin production and screws up the body's circadian rhythm.

</offtopic>
You are correct, but please don't put anything in the bathroom or bedroom that isn't daylight spectrum, if LED go dimmable too.

Wherever the woman does her makeup is best to use daylight spectrum.

Temperature of the bulbs isn't nearly as important as spectrum.
Have you ever looked at something indoors and thought it had an awesome color, like at the store, then got outside and saw it in the daylight only to think this looks horrible?

Spectrum of the bulb distorts the color. Yellow reflects back yellow well but your greens and other colors will look funky and the yellow will even be different outside.
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Old February 16th, 2017, 22:55   #38
TomB
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LOL! Is this seriously a real post?

That usage is so minor... No real impact.

Yeah get rid of that alternator and run off battery. When do you charge the battery, it goes dead eventually?
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