[ale] More on LEDs...

[Ron Frazier (ALE)]

Hi Adrya,

I actually looked through all those links I sent previously in response to your message on ale.  I think that 2nd link you mentioned is probably the best for my tail light app.  Also, the source you mentioned is better at giving specs, particularly lumens, watts, and dimensions, and videos, than almost all others.

To whom it may concern: on one trailer site, they said the led color must match the lens color on the fixture or the light output will be too low.  I would have thought I could buy white leds, but maybe I'll get red instead.

Sincerely,

Ron



Adrya Stembridge <adrya.stembridge at gmail.com> wrote:

>I used one of these as the primary brake light of my KTM dual sport:
>
>http://www.ledlight.com/36_led_ultra_bright_low_profile_s25.aspx
>
>The light output is equivalent to the incandescent 1157, in a
>subjective
>comparison.   This particular bulb throws light to the sides and back,
>so
>it may be a better fit for your car application.
>
>I'm now using this one:
>http://www.ledlight.com/s25-20-super-flux-led-light.aspx
>
>I've also added a set of U32 Hyperlights, which are visible to the
>point of
>being semi-obnoxious to someone directly behind me.
>
>Adrya
>
>
>On Fri, Aug 16, 2013 at 3:10 PM, Ron Frazier (ALE) <
>atllinuxenthinfo at techstarship.com> wrote:
>
>> Hi all,
>>
>> I'm learning more about what you can, and cannot do with leds.  I
>> discovered the tail light in my car was out.  The car is a Hyundai
>Santa Fe
>> compact suv.  It has a combined brake light and tail light which uses
>a
>> dual filament bulb, an 1157.  I found the 1157R led bulb at autozone
>and
>> put it in the car.  The bulb was barely visible at all when the brake
>pedal
>> was pushed, although it did turn on.
>>
>> It just so happens that this car has a very complex reflector
>mechanism
>> that's designed to take light from all directions around the bulb and
>> channel it to the rear.  It also had a shield in front of the bulb
>which
>> prevents light from going directly to the rear, presumably for the
>benefit
>> of other drivers.
>>
>> So, the ONLY way the light can get out is to go to the side and
>bounce off
>> the mirror.  The replacement bulb that autozone had essentially had
>10 or
>> so conventional leds in an array on a flat circuit board.  Almost all
>of
>> its light output is directly to the rear and very little to the side.
> So,
>> with the new led bulb, my brake lights were almost invisible in the
>day
>> time.
>>
>> Oh well, I'm back to edison style bulbs, and, unfortunately, they
>work
>> much better, they just don't last long.
>>
>> Sincerely,
>>
>> Ron
>>
>>
>> -snip-
>>
>>



--

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Ron Frazier
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linuxdude AT techstarship.com
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