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Stepping Off Into The Deep LED Unknown ...
Posted by: chopper
Date: May 20, 2014 03:33PM
Would like to put an LED tail/brake light in my motorcycle, a late 1980s Hawk GT.

I've discerned that the current bulbs in it are marked "Stanley 12v32/3cpbhn"'s. (whatever that means) The pins are staggered on it.

Anyone know what my options are for a pair of LED bulbs?
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Re: Stepping Off Into The Deep LED Unknown ...
Posted by: M>B>
Date: May 20, 2014 04:04PM
A photograph of the bulb you are trying to replace would be helpful.
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Re: Stepping Off Into The Deep LED Unknown ...
Posted by: Catzilla
Date: May 20, 2014 04:08PM
I was pondering the same thing earlier, it was pointed out in that thread that the load qualities of an LED are different and would mess with the flash rate. I witnessed that today on a pick-up, flashing like one bulb was burned out.

Duh, you said tail/stop, nevermind.



Edited 1 time(s). Last edit at 05/20/2014 04:09PM by Catzilla.
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Re: Stepping Off Into The Deep LED Unknown ...
Posted by: flareslow
Date: May 20, 2014 04:45PM
According to goo.le, it's an 1157

Pricey, but good reviews:

1157 LED
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Re: Stepping Off Into The Deep LED Unknown ...
Posted by: Fred_Also
Date: May 20, 2014 06:33PM
Quote
flareslow
According to goo.le, it's an 1157

Pricey, but good reviews:

1157 LED

Why does the last picture of that bulb say 12 VAC? Just wondering.



Fred
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Re: Stepping Off Into The Deep LED Unknown ...
Posted by: flareslow
Date: May 20, 2014 08:19PM
I don't know. That's pretty strange, in some photos it's 12VAC and in others it's 12VDC. Maybe they have some Q.C. issues.

Mike
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Re: Stepping Off Into The Deep LED Unknown ...
Posted by: billb
Date: May 21, 2014 12:56AM
Quote
flareslow
I don't know. That's pretty strange, in some photos it's 12VAC and in others it's 12VDC. Maybe they have some Q.C. issues.

Mike

They go both ways.

at 60 hz ( AC ) the an led will be on 60 times in a second and off 60 times in a second


there's likely a bridge rectifier behind those little chip LEDs solving the AC flicker and allowing the LED to work with reverse polarity at the lamp base rather than blowing up
depending on what polarized:yes means in the specifications
if it means positive has to be applied on the bottom center pin then there is no bridge rectifier and it will flicker on ac
you probably won't see the flicker

apply 120 volts to a 3 volt led and you might have a projectile rather than a light emitting diode



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Edited 2 time(s). Last edit at 05/21/2014 01:27AM by billb.
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Re: Stepping Off Into The Deep LED Unknown ...
Posted by: N-OS X-tasy!
Date: May 21, 2014 02:52AM
Quote
billb
Quote
flareslow
I don't know. That's pretty strange, in some photos it's 12VAC and in others it's 12VDC. Maybe they have some Q.C. issues.

They go both ways.

I see what you did there.



It is what it is.
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Re: Stepping Off Into The Deep LED Unknown ...
Posted by: RAMd®d
Date: May 21, 2014 04:22PM
it was pointed out in that thread that the load qualities of an LED are different and would mess with the flash rate.

True, but not with the same consequences.

With an incandescent, the bulb never reaches full brightness. An LED does, or very nearly so. It just looks a little twitchy. This is all averted by replacing the cheap mechanical flasher with an inexpensive electronic version. A far better solution than resistors.

I just haven't seen an LED replacement yet for tail/brake light or turn signal that I like. If they radiate light in all directions like an incandescent, it's not as bright. When the replacement *is* as bright, it's a bright spot of light, and the rest of the light assembly is noticeably dimmer.

Replacement LEDs provide reduced current drain and potential longer life than incandescents. At this point in technology, I'd be tempted to add LEDs rather than use them as replacements.




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