Go Back   English Forum Switzerland > Help & tips > Transportation/driving
Reply
 
Thread Tools Display Modes
  #1  
Old 21.01.2015, 15:18
robogobo's Avatar
Member
 
Join Date: Sep 2008
Location: Horw (LU)
Posts: 178
Groaned at 16 Times in 9 Posts
Thanked 82 Times in 53 Posts
robogobo is considered knowledgeablerobogobo is considered knowledgeablerobogobo is considered knowledgeable
The real scoop on yellow headlights

I'm modding several old cb125 motorcycles, all pre-1980, and due to their 6V charging systems, they tend to suffer from underpowered lighting, particularly at low rpms while blinkers are flashing, and forget about using the horn. So, to alleviate the problem, I've outfitted them with LED lamps. That fixes the power problem, but introduces two other problems: 1) the light is an awful blueish color that calls attention to this (questionable legality) mod, and 2) the light is an awful blueish color that looks awful, especially on a vintage bike.

So my question is this - what are the chances that putting a yellow tint on the lens would a) fix the blue problem while being totally legal in itself or b) fix the blue problem while calling attention to itself and being even more illegal than the LED itself?

A fun question!
__________________

Reply With Quote
  #2  
Old 21.01.2015, 15:29
Forum Veteran
 
Join Date: Mar 2010
Location: Biel
Posts: 788
Groaned at 35 Times in 28 Posts
Thanked 715 Times in 363 Posts
glinaa has an excellent reputationglinaa has an excellent reputationglinaa has an excellent reputationglinaa has an excellent reputation
Re: The real scoop on yellow headlights

Quote:
View Post
That fixes the power problem, but introduces two other problems: 1) the light is an awful blueish color that calls attention to this (questionable legality) mod, and 2) the light is an awful blueish color that looks awful, especially on a vintage bike.
Do not tint the lenses, but get warm-white colored LED diodes instead.
Reply With Quote
This user would like to thank glinaa for this useful post:
  #3  
Old 21.01.2015, 15:33
robogobo's Avatar
Member
 
Join Date: Sep 2008
Location: Horw (LU)
Posts: 178
Groaned at 16 Times in 9 Posts
Thanked 82 Times in 53 Posts
robogobo is considered knowledgeablerobogobo is considered knowledgeablerobogobo is considered knowledgeable
Re: The real scoop on yellow headlights

Quote:
View Post
Do not tint the lenses, but get warm-white colored LED diodes instead.
Unfortunately nobody makes them for 6v systems. I was limited to exactly one manufacturer, which is why they're legally questionable, and quite blueish.
Reply With Quote
  #4  
Old 21.01.2015, 15:36
Forum Veteran
 
Join Date: May 2013
Location: Nyon
Posts: 1,828
Groaned at 61 Times in 33 Posts
Thanked 2,126 Times in 834 Posts
John_H has a reputation beyond reputeJohn_H has a reputation beyond reputeJohn_H has a reputation beyond reputeJohn_H has a reputation beyond reputeJohn_H has a reputation beyond repute
Re: The real scoop on yellow headlights

Could you not tint the bulb instead of the lens .. simply by painting it with paint you would use on glass? I don't know it's technical name. LEDs are glass or they will be covered with glass.
Reply With Quote
  #5  
Old 21.01.2015, 15:40
st2lemans's Avatar
Forum Legend
 
Join Date: Dec 2010
Location: Lugano
Posts: 18,143
Groaned at 926 Times in 722 Posts
Thanked 19,731 Times in 9,480 Posts
st2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond repute
Re: The real scoop on yellow headlights

Remove the blinkers.

Tom
Reply With Quote
This user would like to thank st2lemans for this useful post:
  #6  
Old 21.01.2015, 15:42
bigblue2's Avatar
Forum Legend
 
Join Date: Mar 2009
Location: Glarus
Posts: 6,152
Groaned at 309 Times in 249 Posts
Thanked 9,529 Times in 3,870 Posts
bigblue2 has a reputation beyond reputebigblue2 has a reputation beyond reputebigblue2 has a reputation beyond reputebigblue2 has a reputation beyond reputebigblue2 has a reputation beyond reputebigblue2 has a reputation beyond repute
Re: The real scoop on yellow headlights

upgrade the bike to 12v?
Reply With Quote
This user would like to thank bigblue2 for this useful post:
  #7  
Old 21.01.2015, 16:00
robogobo's Avatar
Member
 
Join Date: Sep 2008
Location: Horw (LU)
Posts: 178
Groaned at 16 Times in 9 Posts
Thanked 82 Times in 53 Posts
robogobo is considered knowledgeablerobogobo is considered knowledgeablerobogobo is considered knowledgeable
Re: The real scoop on yellow headlights

Quote:
View Post
Could you not tint the bulb instead of the lens .. simply by painting it with paint you would use on glass? I don't know it's technical name. LEDs are glass or they will be covered with glass.
Can't paint directly on the diode. Options are to paint the reflector or gel the lens. The latter is more easily reversed.
Reply With Quote
  #8  
Old 21.01.2015, 16:01
robogobo's Avatar
Member
 
Join Date: Sep 2008
Location: Horw (LU)
Posts: 178
Groaned at 16 Times in 9 Posts
Thanked 82 Times in 53 Posts
robogobo is considered knowledgeablerobogobo is considered knowledgeablerobogobo is considered knowledgeable
Re: The real scoop on yellow headlights

Quote:
View Post
Remove the blinkers.

Tom
If there are any components on the bike that indicate it had blinkers at manufacture, there must be working blinkers. Besides, blinkers are good.
Reply With Quote
  #9  
Old 21.01.2015, 16:03
robogobo's Avatar
Member
 
Join Date: Sep 2008
Location: Horw (LU)
Posts: 178
Groaned at 16 Times in 9 Posts
Thanked 82 Times in 53 Posts
robogobo is considered knowledgeablerobogobo is considered knowledgeablerobogobo is considered knowledgeable
Re: The real scoop on yellow headlights

Quote:
View Post
upgrade the bike to 12v?
Way too involved and costly.

My real question here is whether yellow headlights are actually illegal. Anybody know? And are there any exceptions (ie 35 year old motorcycles)?
Reply With Quote
  #10  
Old 21.01.2015, 16:06
Today only's Avatar
Forum Legend
 
Join Date: Dec 2010
Location: Europe
Posts: 3,755
Groaned at 484 Times in 294 Posts
Thanked 4,008 Times in 1,993 Posts
Today only has a reputation beyond reputeToday only has a reputation beyond reputeToday only has a reputation beyond reputeToday only has a reputation beyond reputeToday only has a reputation beyond repute
Re: The real scoop on yellow headlights

Don't ride it in the dark....
Reply With Quote
The following 3 users would like to thank Today only for this useful post:
  #11  
Old 21.01.2015, 16:07
st2lemans's Avatar
Forum Legend
 
Join Date: Dec 2010
Location: Lugano
Posts: 18,143
Groaned at 926 Times in 722 Posts
Thanked 19,731 Times in 9,480 Posts
st2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond reputest2lemans has a reputation beyond repute
Re: The real scoop on yellow headlights

Quote:
View Post
If there are any components on the bike that indicate it had blinkers at manufacture, there must be working blinkers.
If the blinkers are mounted, they must work, but you are allowed to remove the blinkers.

I have done so with two of my bikes, one a Guzzi from '85, the other a Ducati from '05 (the others still have blinkers).

Perfectly legal in CH.

Tom
Reply With Quote
The following 2 users would like to thank st2lemans for this useful post:
  #12  
Old 21.01.2015, 16:08
amogles's Avatar
Forum Legend
 
Join Date: Mar 2008
Location: Zurich
Posts: 8,411
Groaned at 141 Times in 122 Posts
Thanked 14,611 Times in 6,217 Posts
amogles has a reputation beyond reputeamogles has a reputation beyond reputeamogles has a reputation beyond reputeamogles has a reputation beyond reputeamogles has a reputation beyond reputeamogles has a reputation beyond repute
Re: The real scoop on yellow headlights

The light from LEDs has rather narrow spectral bands and hence doesn't react well to being filtered with tinted glass.
Reply With Quote
The following 3 users would like to thank amogles for this useful post:
  #13  
Old 21.01.2015, 16:16
robogobo's Avatar
Member
 
Join Date: Sep 2008
Location: Horw (LU)
Posts: 178
Groaned at 16 Times in 9 Posts
Thanked 82 Times in 53 Posts
robogobo is considered knowledgeablerobogobo is considered knowledgeablerobogobo is considered knowledgeable
Re: The real scoop on yellow headlights

Quote:
View Post
Don't ride it in the dark....
That's it!
Reply With Quote
  #14  
Old 21.01.2015, 16:19
robogobo's Avatar
Member
 
Join Date: Sep 2008
Location: Horw (LU)
Posts: 178
Groaned at 16 Times in 9 Posts
Thanked 82 Times in 53 Posts
robogobo is considered knowledgeablerobogobo is considered knowledgeablerobogobo is considered knowledgeable
Re: The real scoop on yellow headlights

Quote:
View Post
The light from LEDs has rather narrow spectral bands and hence doesn't react well to being filtered with tinted glass.
That's true, and therefore white LEDs behind a yellow lens don't work for the blinkers, and so I ordered yellow LEDs for those. However, I tested the blueish LEDs behind yellow glass and they whiten it up very nicely, with a very cool yellow ring around the edges. Looks great on an old bike.

But my question remains, are yellow tinted headlights legal in CH?

Last edited by robogobo; 21.01.2015 at 16:19. Reason: Autocorrect thinks it's so smart
Reply With Quote
  #15  
Old 21.01.2015, 16:26
bigblue2's Avatar
Forum Legend
 
Join Date: Mar 2009
Location: Glarus
Posts: 6,152
Groaned at 309 Times in 249 Posts
Thanked 9,529 Times in 3,870 Posts
bigblue2 has a reputation beyond reputebigblue2 has a reputation beyond reputebigblue2 has a reputation beyond reputebigblue2 has a reputation beyond reputebigblue2 has a reputation beyond reputebigblue2 has a reputation beyond repute
Re: The real scoop on yellow headlights

Its an old bike, you only have to change a couple of things and the battery, in my VW beetle days changing from 6v to 12v was a doddle regulator, alternator, and bulbs, job done
Reply With Quote
The following 2 users would like to thank bigblue2 for this useful post:
  #16  
Old 21.01.2015, 16:48
robogobo's Avatar
Member
 
Join Date: Sep 2008
Location: Horw (LU)
Posts: 178
Groaned at 16 Times in 9 Posts
Thanked 82 Times in 53 Posts
robogobo is considered knowledgeablerobogobo is considered knowledgeablerobogobo is considered knowledgeable
Re: The real scoop on yellow headlights

Quote:
View Post
Its an old bike, you only have to change a couple of things and the battery, in my VW beetle days changing from 6v to 12v was a doddle regulator, alternator, and bulbs, job done
The only way to do it on these bikes is to rewind the stator or find an old cb350 stator to drop in. LEDs turned out to be the least invasive surgery.
Reply With Quote
  #17  
Old 21.01.2015, 16:50
Don Molina's Avatar
Forum Veteran
 
Join Date: Jul 2012
Location: Zurich
Posts: 610
Groaned at 17 Times in 12 Posts
Thanked 880 Times in 372 Posts
Don Molina has a reputation beyond reputeDon Molina has a reputation beyond reputeDon Molina has a reputation beyond reputeDon Molina has a reputation beyond repute
Re: The real scoop on yellow headlights

Legally speaking I think that as long as the lights are passing the test at the MFK you're good to go. Meaning targeting low and far enough, sufficient intensities etc.

For the actual colour, I know for the EU that if a car could/would be outfitted with a selective yellow lamp (for fog/rain/bad weather) it's OK to retrofit one, even though all modern cars are required to emit "white light" (within specific chromatic coordinates). So in this case it doesn't matter what tint (if any) is on the lens as long as the final product is of sufficient intensity, and acceptable colour.

So imho if you show up at MFK and the lamp works fine and your lights are actually working within spec, they shouldn't give you any trouble.

If you're too worried just change it to 12V and be done with it
__________________
Nothing is fool-proof to a sufficiently talented fool
Reply With Quote
This user would like to thank Don Molina for this useful post:
  #18  
Old 21.01.2015, 17:50
robogobo's Avatar
Member
 
Join Date: Sep 2008
Location: Horw (LU)
Posts: 178
Groaned at 16 Times in 9 Posts
Thanked 82 Times in 53 Posts
robogobo is considered knowledgeablerobogobo is considered knowledgeablerobogobo is considered knowledgeable
Re: The real scoop on yellow headlights

Quote:
View Post
Legally speaking I think that as long as the lights are passing the test at the MFK you're good to go. Meaning targeting low and far enough, sufficient intensities etc.

For the actual colour, I know for the EU that if a car could/would be outfitted with a selective yellow lamp (for fog/rain/bad weather) it's OK to retrofit one, even though all modern cars are required to emit "white light" (within specific chromatic coordinates). So in this case it doesn't matter what tint (if any) is on the lens as long as the final product is of sufficient intensity, and acceptable colour.

So imho if you show up at MFK and the lamp works fine and your lights are actually working within spec, they shouldn't give you any trouble.

If you're too worried just change it to 12V and be done with it
Very logical Don. Thanks a lot. I had planned on swapping the bulbs back to original for the MFK, so I just hope the police share your logic when they see it on the street. The nice thing about these small motorcycles is they tend to go unnoticed regarding things such as parking, etc.
Reply With Quote
  #19  
Old 21.01.2015, 23:15
Forum Veteran
 
Join Date: Mar 2010
Location: Biel
Posts: 788
Groaned at 35 Times in 28 Posts
Thanked 715 Times in 363 Posts
glinaa has an excellent reputationglinaa has an excellent reputationglinaa has an excellent reputationglinaa has an excellent reputation
Re: The real scoop on yellow headlights

Quote:
View Post
Unfortunately nobody makes them for 6v systems. I was limited to exactly one manufacturer, which is why they're legally questionable, and quite blueish.
Can you show me the bulb you're talking about?

The thing is - no LED is really for either 6V or 12V. The forward voltage of a typical white LED is around 3V.
The internal circuitry reduces the voltage to what is needed.

I'd bet you can use most LED bulbs designed for 12V without any problems.

Last edited by glinaa; 21.01.2015 at 23:26.
Reply With Quote
  #20  
Old 22.01.2015, 00:57
robogobo's Avatar
Member
 
Join Date: Sep 2008
Location: Horw (LU)
Posts: 178
Groaned at 16 Times in 9 Posts
Thanked 82 Times in 53 Posts
robogobo is considered knowledgeablerobogobo is considered knowledgeablerobogobo is considered knowledgeable
Re: The real scoop on yellow headlights

Quote:
View Post
Can you show me the bulb you're talking about?

The thing is - no LED is really for either 6V or 12V. The forward voltage of a typical white LED is around 3V.
The internal circuitry reduces the voltage to what is needed.

I'd bet you can use most LED bulbs designed for 12V without any problems.
I tried four different bulbs rated for 12V (or higher - they always have a range but 12V is usually at the lower end) and they all flickered horribly. It's not the LEDs themselves that are the problem, but the controller circuitry driving them. LEDs have a minimum wattage needed to drive them, below which they flicker rapidly on/off. These are the only ones "rated" for 6V and even these flicker a bit at idle.

http://www.ebay.com/itm/291153502775?item=291153502775

...and there are a few variations on the same bulb in the links below it, but I tried them all, and they most likely come off the same assembly line.
__________________

Reply With Quote
This user would like to thank robogobo for this useful post:
Reply




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Converting headlights on motorbike? gvanrenterghem Transportation/driving 2 04.06.2014 16:14
Advice on buying headlights + windows alanmack Transportation/driving 3 10.01.2011 12:21
If I step on the yellow lines, do the cars have to let me cross? famous Daily life 59 26.06.2010 11:41


All times are GMT +2. The time now is 03:51.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.1.0