Parking Lights
Author
Discussion

elliotff

Original Poster:

174 posts

171 months

Monday 25th March 2013
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Does anybody use their parking lights on a regular basis ? If so how long would the battery last if the battery was 80amph?

Krikkit

27,941 posts

212 months

Monday 25th March 2013
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Assuming a full discharge at constant 12V, with a 10W draw (two sidelight bulbs), 96 hours if my fag-packet maths is right. Obviously it's a bit more complex than that, with batteries being rather complicated in how they discharge, but that's not a bad stab.

750turbo

6,164 posts

255 months

Monday 25th March 2013
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elliotff said:
Does anybody use their parking lights on a regular basis ? If so how long would the battery last if the battery was 80amph?
Nope, and many people on here will have no idea what you mean by a parking light.

mcford

819 posts

205 months

Monday 25th March 2013
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Position lamps are typically 5 Watts a piece, assuming one at each corner plus a registration plate lamp and you're looking at 25 Watts total. Divide 25 by the voltage (12) and you're looking at 2 Amps. Your 80 Ah battery will last around 40 hours from fully charged to completely flat, though it will be around 32 hours if you want to start the engine assuming a current draw of 300 Amps for 6 seconds by the starter motor.

Ray Luxury-Yacht

8,918 posts

247 months

Monday 25th March 2013
quotequote all
The parking light system on my Skoda Octavia is switched via the indicator stalk with the ignition switch off, so you can select left or right side.

It activates the front and rear sidelights only - no number plate lamps illuminate.

I parked outside a mate's house the other night, and I was slightly concerned about the darkness of the parking spot, and the proximity to a junction - albeit in the middle of a housing estate, so for the first time I used them.

They were on for 6 hours (with a draw of 10 watts), and when I returned to the car, the starter motor spun with no discernible difference in speed at all to normal, so for that period of time, I would imagine that the current draw from the battery was negligeable, and that if I had left them on for, say, the entire night, there would have been no problem come the morning.

HTH

Loose Chippings

1,127 posts

164 months

Tuesday 26th March 2013
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Ray Luxury-Yacht said:
The parking light system on my Skoda Octavia is switched via the indicator stalk with the ignition switch off, so you can select left or right side.

It activates the front and rear sidelights only - no number plate lamps illuminate.

I parked outside a mate's house the other night, and I was slightly concerned about the darkness of the parking spot, and the proximity to a junction - albeit in the middle of a housing estate, so for the first time I used them.

They were on for 6 hours (with a draw of 10 watts), and when I returned to the car, the starter motor spun with no discernible difference in speed at all to normal, so for that period of time, I would imagine that the current draw from the battery was negligeable, and that if I had left them on for, say, the entire night, there would have been no problem come the morning.

HTH
My Astra has this too, where you push the indicator stalk to operate what side of the car you want to be lit once the ignition is off. I've only used it once or twice while parked for a short period of time if in a badly lit street or possibly narrow road. Not sure I would trust using them all night though.

big_boz

1,685 posts

238 months

Tuesday 26th March 2013
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If i am parked precariously (which is never for very long) i tend to leave the relevant side parking light on.


billzeebub

3,913 posts

230 months

Tuesday 26th March 2013
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Never used them intentionally

s p a c e m a n

12,148 posts

179 months

Tuesday 26th March 2013
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Do aftermarket led lights draw less current, therefore can be left longer?

Loose Chippings

1,127 posts

164 months

Tuesday 26th March 2013
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s p a c e m a n said:
Do aftermarket led lights draw less current, therefore can be left longer?
Do they work with their own battery? Presume they don't work off the cigarette lighter socket or you would have to leave keys in the car when parked!

tigger1

8,478 posts

252 months

Tuesday 26th March 2013
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Use them on mine if ever I'm parked on an unlit road at night...as is my understanding of the rules.

TangerinePool

1,394 posts

221 months

Tuesday 26th March 2013
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Imagine if this catches on!

Cue loads of people hammering on doors at 11pm to remind folk they've left their lefts on, all the while thinking demmick needs to replace the bulbs in the other side

paulrussell

2,311 posts

192 months

Tuesday 26th March 2013
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What are parking lights?

s p a c e m a n

12,148 posts

179 months

Tuesday 26th March 2013
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Loose Chippings said:
s p a c e m a n said:
Do aftermarket led lights draw less current, therefore can be left longer?
Do they work with their own battery? Presume they don't work off the cigarette lighter socket or you would have to leave keys in the car when parked!
Nooo, you can get led replacement bulbs for standard lights. Infact a lot of newer cars have led bulbs instead of filament.

Benrad

657 posts

180 months

Tuesday 26th March 2013
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Should you illuminate the side nearest the kerb or furthest from it? Haven't actually checked how to turn mine on, bought the car in October!

Krikkit

27,941 posts

212 months

Tuesday 26th March 2013
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s p a c e m a n said:
Loose Chippings said:
s p a c e m a n said:
Do aftermarket led lights draw less current, therefore can be left longer?
Do they work with their own battery? Presume they don't work off the cigarette lighter socket or you would have to leave keys in the car when parked!
Nooo, you can get led replacement bulbs for standard lights. Infact a lot of newer cars have led bulbs instead of filament.
Theoretically, yes, practically the ones that replace filaments usually have a resistor to increase current draw to fool CAN monitoring systems that a bulb hasn't blown. That, and the LED ones often have several LED's for more light, rather than better power-saving.

KeithE

110 posts

201 months

Tuesday 26th March 2013
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No idea how long in total but had to abandon my BMW in the snow last week and left the parking lights on (one side only) overnight and until I could get back and rescue the car. Total of approximately 14 hours. Started first turn with no noticable difference.

Loose Chippings

1,127 posts

164 months

Tuesday 26th March 2013
quotequote all
s p a c e m a n said:
Nooo, you can get led replacement bulbs for standard lights. Infact a lot of newer cars have led bulbs instead of filament.
Sorry, misunderstood, thought it was an after market light that was being talked about, not just the bulb.

Also to the poster who asked which light you should switch on, it should always be whatever side of the car is in the middle of the road, not the kerbside one.

Benrad

657 posts

180 months

Tuesday 26th March 2013
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Loose Chippings said:
Sorry, misunderstood, thought it was an after market light that was being talked about, not just the bulb.

Also to the poster who asked which light you should switch on, it should always be whatever side of the car is in the middle of the road, not the kerbside one.
Thanks smile