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ProfessorF
What's a life?
Joined: Thu Apr 23, 2009 7:56 pm
Posts: 12030
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I've just had the reverse light on the car blow - so I'm thinking of sticking in LEDs to replace the bulb.
While I've got the housing off, I thought I might as well do the others - but here's the thing:
Should I stick a red LED bulb in for the brake/side lights when the lens cover is already red, or would a white LED do just as well?
Would the red LED be bright enough behind the red lens?
The bulbs themselves have no colouring, of course, so I thought a white LED would be ok, but now I have doubt.
Any thoughts?
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| Thu Jan 20, 2011 12:51 am |
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Nick
Spends far too much time on here
Joined: Thu Apr 23, 2009 11:36 pm
Posts: 3527
Location: Portsmouth
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I reckon white would be ideal - unless there is a crack in the cover and you are going to fail the test on it without a red source.
Is there a price difference??
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| Thu Jan 20, 2011 1:01 am |
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JJW009
I haven't seen my friends in so long
Joined: Thu Apr 23, 2009 6:58 pm
Posts: 8767
Location: behind the sofa
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It makes more sense to use red, from a purely scientific perspective.
White LEDs work by having a Blue LED coated in a phosphorescent powder which converts the blue light into white, a bit like a fluorescent tube. The red filter on the brake cluster then blocks all the light that isn't red. The efficiency losses are high.
Red LEDs emit red light which goes through the red filter. Losses are low.
Of course, it totally depends on what you can actually buy!
_________________jonbwfc's law: "In any forum thread someone will, no matter what the subject, mention Firefly." When you're feeling too silly for x404, youRwired.net
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| Thu Jan 20, 2011 1:38 am |
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Amnesia10
Legend
Joined: Fri Apr 24, 2009 2:02 am
Posts: 29240
Location: Guantanamo Bay (thanks bobbdobbs)
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A red LED would also mean that if you lost the cover you would still be legal as far as your brake lights.
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| Thu Jan 20, 2011 11:38 am |
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okenobi
Spends far too much time on here
Joined: Thu Apr 23, 2009 6:59 pm
Posts: 4932
Location: Sestriere, Piemonte, Italia
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Personally, I've had nothing but issues with LED replacements. So now I just stick with uprated fronts and boggo rears.
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| Thu Jan 20, 2011 11:42 am |
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ChurchCat
Doesn't have much of a life
Joined: Sat Apr 25, 2009 7:57 am
Posts: 1652
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"boggo"?  _________________A Mac user 
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| Thu Jan 20, 2011 1:28 pm |
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EddArmitage
I haven't seen my friends in so long
Joined: Thu Apr 23, 2009 9:40 pm
Posts: 5288
Location: ln -s /London ~
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Bog standard, perhaps? Not sure.
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| Thu Jan 20, 2011 1:28 pm |
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okenobi
Spends far too much time on here
Joined: Thu Apr 23, 2009 6:59 pm
Posts: 4932
Location: Sestriere, Piemonte, Italia
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Correct. It would appear my colloquialisms are not fairing too well of late.
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| Thu Jan 20, 2011 2:14 pm |
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timark_uk
Moderator
Joined: Thu Apr 23, 2009 6:11 pm
Posts: 12143
Location: Belfast
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I got the 'boggo' meaning. (8+) Mark
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| Thu Jan 20, 2011 2:20 pm |
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EddArmitage
I haven't seen my friends in so long
Joined: Thu Apr 23, 2009 9:40 pm
Posts: 5288
Location: ln -s /London ~
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I did too, but then I started questioning my intuition.
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| Thu Jan 20, 2011 2:35 pm |
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timark_uk
Moderator
Joined: Thu Apr 23, 2009 6:11 pm
Posts: 12143
Location: Belfast
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N00b. I knew you were correct in your original assumption, Edd. Mark
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| Thu Jan 20, 2011 2:37 pm |
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veato
I haven't seen my friends in so long
Joined: Fri Apr 24, 2009 7:17 am
Posts: 5550
Location: Nottingham
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I like to upgrade the fronts (fully legal but some idiots still flash thinking I've got full beam on) but use 'boggo' bulbs on the back too.
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| Thu Jan 20, 2011 2:51 pm |
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ChurchCat
Doesn't have much of a life
Joined: Sat Apr 25, 2009 7:57 am
Posts: 1652
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You young kids with your hip talkin'  _________________A Mac user
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| Thu Jan 20, 2011 3:13 pm |
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okenobi
Spends far too much time on here
Joined: Thu Apr 23, 2009 6:59 pm
Posts: 4932
Location: Sestriere, Piemonte, Italia
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It totally makes sense. Innit.
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| Thu Jan 20, 2011 3:38 pm |
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forquare1
I haven't seen my friends in so long
Joined: Thu Apr 23, 2009 6:36 pm
Posts: 5150
Location: /dev/tty0
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Do you set them low so they don't shine in other drivers faces? The problem I've seen is that people don't have their full beams on (you can see they switch as they come round the corner) but have the headlights angled way too high...
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| Thu Jan 20, 2011 3:50 pm |
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