dylansdad
Member Since: 04 Apr 2006
Location: Solihull
Posts: 745
  
|
sorry but my understanding of electronics leads me to disagree.
a bulb is pretty arcaic ... a piece of wire that gets hot generates light .... fundementally a overheated resistor.
an LED is a diode, and requires a certain amount of power to 'turn it on' or operate it.... my grey cells seem to recall .7v drop across diode but Im not sure, anyway... point is if for example operating a diode required 10mA then the 40/130 figures would become 30/120 which brings you from a ratio of 1:3.25 to a 1:4 ratio... and is suspect the filament bulbs because they are so inefficient wouldnt be a straight line relationship of power to light output anyway so the 1:4.2 ratio you mention would certainly be lower.... Ie 1 21W bulb woulnt generate as much light as 4x5w ones. There is also probably a resistor in series with the LED (as they would just burn up if you whacked the full voltage of the vehicle across them) which will mean such a direct comparisson is just not possible.
I think its far more complex than comparing differences in ratios of power for filament bulbs and current draw for LEDs. I suspect the answer lies more to do with directional and spectral issues as 10fc mentioned..... you have to remember the LED may actually be making more light but a more focused beam whereas a bulb is more scattered but would take full advantage of the reflectors and any prisms etc in the design of the cluster. theres a lot of variables  now my head is aching and i will go back to work  2004 TDV6 HSE Auto Zambezi Silver
|
 10th Oct 2006 3:14 pm |
|
|
DG
Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50934
|
How complicated 
Like many things ....the proof is in the pudding The best way is to make a direct comparison of a standard D3 sat next to a D3 with LED's ...and see for yourself.
If your coming to the SE meet next Tuesday night you can do just that ....Ken2463 has stop & tail LED's fitted  21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
|
| 10th Oct 2006 4:57 pm |
|
|
DiscoStu
Member Since: 09 Apr 2006
Location: London
Posts: 11412
|
 We already know the LEDs are not as bright as the standard brake lamp.
We just need brighter LEDs! 8) Disco 5 HSE Lux
https://www.youtube.com/watch?v=peyiqaJrmMU
|
| 10th Oct 2006 5:05 pm |
|
|
Ken
Member Since: 20 Feb 2006
Location: Here
Posts: 10865
|
DiscoStu wrote: We already know the LEDs are not as bright as the standard brake lamp.
We just need brighter LEDs! 8)
Do we  might have some rear facing lightforce 140's fitted by then linked to the brake lights
|
| 10th Oct 2006 5:09 pm |
|
|
|
|
Ken
Member Since: 20 Feb 2006
Location: Here
Posts: 10865
|
I'm just making sure my D3 has the same light projection front & rear (F-bright)
|
| 10th Oct 2006 5:16 pm |
|
|
DiscoStu
Member Since: 09 Apr 2006
Location: London
Posts: 11412
|
Not sure brake lights like that would be effective - whoever's behind would just be blinded instantly and hit you at full speed! Disco 5 HSE Lux
https://www.youtube.com/watch?v=peyiqaJrmMU
|
| 10th Oct 2006 5:24 pm |
|
|
dylansdad
Member Since: 04 Apr 2006
Location: Solihull
Posts: 745
|
yeah but didnt you know ....its their fault if they run into the back of you! ..... hmmm another prius destroying game in the offing me thinks 2004 TDV6 HSE Auto Zambezi Silver
|
| 10th Oct 2006 5:26 pm |
|
|
DiscoStu
Member Since: 09 Apr 2006
Location: London
Posts: 11412
|
8) Now that's a better game!
Had a Citroen Saxo run into the back of my Freelander once. Two broken lights on mine, the damage to his was enormous! His headlights were pointing downwards! Imagine a Prius vs D3...  Disco 5 HSE Lux
https://www.youtube.com/watch?v=peyiqaJrmMU
|
| 10th Oct 2006 5:31 pm |
|
|
dylansdad
Member Since: 04 Apr 2006
Location: Solihull
Posts: 745
|
especially if you can fit a rear bullbar type thing.
reminds me of the old trick to  off someone who is tailgating.... with lights on, accelerate as you flick on rear fogs... assuming theyre positioned near brakelights usually results in tailgater slaming on anchors only to see you gain an infuriating lead in their race for the imaginary 1st place. 2004 TDV6 HSE Auto Zambezi Silver
|
| 10th Oct 2006 5:35 pm |
|
|
DSL
Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
|
I used to have one of 4 windscreen washer jets aligned to just miss the screen, anyone tailgating got a bit of spray & they soon backed off! 
|
| 10th Oct 2006 6:22 pm |
|
|
fakesnake
Member Since: 30 Mar 2006
Location: Leicestershire
Posts: 281
 
|
DSL wrote:I used to have one of 4 windscreen washer jets aligned to just miss the screen, anyone tailgating got a bit of spray & they soon backed off!
Mine does that anyway -cracking idea though!! Richard
|
| 13th Oct 2006 11:47 am |
|
|
DSL
Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
|
I don't have the energy to read back through 8 pages (I know, I'm a lazy student!!!) but why? What is wrong with the ones LR fit when they craft the machine???
|
| 13th Oct 2006 12:09 pm |
|
|
dylansdad
Member Since: 04 Apr 2006
Location: Solihull
Posts: 745
|
DSL wrote: craft ......
craft? I think it should read.....manage to bolt all the bits together correctly 2004 TDV6 HSE Auto Zambezi Silver
|
| 13th Oct 2006 12:28 pm |
|
|
Dom Harvey
Lord of the Four Fingers
Member Since: 15 Apr 2005
Location: Dorset
Posts: 7454
|
dylansdad wrote:.....manage to bolt all the bits together correctly
Except for yours apparently its falling to bits 2004 Discovery 3 - gone
2006 Discovery 3 - gone
2008 Discovery 3 GS - gone
2011 Freelander LE Special Edition - gone
2007 Discovery 3 XS - gone
2012 Discovery 4 GS - current
|
| 13th Oct 2006 12:32 pm |
|
|
