 | Home > Technical > The power savings of LED side and tail lamps |
 
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| Cupboard Member Since: 21 Mar 2014 Location: Suffolk Posts: 2971   
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Because I was interested basically.
The standard setup draws 2.7A, ignition off, sidelights on. With them removed it draws 1.1A With Wipac LEDs fitted it draws 1.2A That fits in about right with the nominal ratings, 0.4*12=5W for the standard bulbs. The Wipac units are rated at 1W each, the stop and indicators are 2W each. Measured using a DC clamp ammeter, which has resolution finer than 0.1A but not the accuracy. How much of a difference does that make? Not a lot really in the grand scheme of things. I guess I now need to fit an LED numberplate light and interior dash lights. |
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29th Dec 2017 4:39pm |
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| Screbble Member Since: 26 Apr 2015 Location: Lancashire Posts: 2024 
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I also find it interesting
Anything that reduces the lead on the battery and alternator, however marginal, has got to be a good thing 
However I'm with Steve on the safety and reliability benefits - in particular the former. The LED lights can be seen from a much greater distance and the reasponse time is far better. That said, I have strayed slightly off topic!  |
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31st Dec 2017 1:16pm |
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| bankz5152 Member Since: 02 Feb 2017 Location: South London/North Kent Posts: 2065 
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Ahh you forget the MOT savings when the cheeky tester tacks on 3 bulbs at £2.50 "because they where out" even though you fit new ones the night before
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31st Dec 2017 1:26pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19535
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Yes, or th the holder is loose, then apparently the bulb blows during the test.
 Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 |
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31st Dec 2017 1:32pm |
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| Cupboard Member Since: 21 Mar 2014 Location: Suffolk Posts: 2971
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That's the reason I fitted them, I was just curious as to what the power consumption change was. As it happens, it's also possible to get the Wipac flasher unit to correctly detect LED trailer lights which is something a lot of people say isn't possible. Mine doesn't have the trailer symbol until I plug the trailer in, then it just works as it should do. |
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1st Jan 2018 1:28pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19535
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They must have updated the new Wipac Relay then, because it didn't detect the trailer at one time but the RDX did.
Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 |
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1st Jan 2018 2:27pm |
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| grafty99 Member Since: 15 Aug 2012 Location: North Devon Posts: 4784 
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My wipac relay detects trailers, about 2 years old I think
2002 90 Td5 Station Wagon
1990 Vogue SE Triumph Tiger Explorer 1200 Td5 90 Thread http://www.defender2.net/forum/topic50767.html Tdi 110 Thread https://www.defender2.net/forum/topic69562.html RRC Thread http://www.defender2.net/forum/topic54492.html Instagram http://www.instagram.com/george_grafton |
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1st Jan 2018 2:31pm |
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| sako243 Member Since: 08 Jul 2014 Location: Wales Posts: 1185  
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I don't know but I tend to find LED lights more dazzling than normal bulbs, particularly in fog. Although it's almost certainly down to the cheapness of the LEDs in use and the choice in colour temperature.
One thing Dad commented on whilst driving the L322 several years ago in Scotland was that at night it was very difficult to distinguish what was snow and what was grass on the verge with the BiXenons. I'll admit the light is much more uniform and there's no denying they throw further but colour interpretation is crap. Can only imagine LEDs headlights are the same given the prospenserity to bluer and bluer lighting. Ed 82 Hotspur Sandringham 6x6 95 Defender 110 300Tdi |
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1st Jan 2018 5:53pm |
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| grafty99 Member Since: 15 Aug 2012 Location: North Devon Posts: 4784
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I find the colour rendering for my speakers is great, it's a white light but no where near as blue as, for example, new Mercedes - which are incredibly blue in comparison.
I don't actually know what the CRI of the Speaker evo2 is but I'd imagine it scores pretty well 2002 90 Td5 Station Wagon
1990 Vogue SE Triumph Tiger Explorer 1200 Td5 90 Thread http://www.defender2.net/forum/topic50767.html Tdi 110 Thread https://www.defender2.net/forum/topic69562.html RRC Thread http://www.defender2.net/forum/topic54492.html Instagram http://www.instagram.com/george_grafton |
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1st Jan 2018 6:02pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19535
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Most for the Defender are around 6000k or what ever it is colour temp.
The Wipac relay at one time definitely didn't used to work with trailer light, but now if it does as mentioned that's good. That gives you two alternatives. I have all RDX on mine, both sets are very good. Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 |
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1st Jan 2018 6:27pm |
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| grafty99 Member Since: 15 Aug 2012 Location: North Devon Posts: 4784
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CRI and Colour temperature are different, The CRI is a measurement of a light source’s accuracy in rendering different colours wheras the Kelvin is the colour temperature of the light source.
You could have two lights with a 6000K colour but very different CRI ratings, generally the better the quality of LED, the higher the CRI 2002 90 Td5 Station Wagon
1990 Vogue SE Triumph Tiger Explorer 1200 Td5 90 Thread http://www.defender2.net/forum/topic50767.html Tdi 110 Thread https://www.defender2.net/forum/topic69562.html RRC Thread http://www.defender2.net/forum/topic54492.html Instagram http://www.instagram.com/george_grafton |
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1st Jan 2018 6:36pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 19535
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Diesel$ Live$ Matter. ⛽️🛢️👨🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧 |
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1st Jan 2018 7:08pm |
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