[AT] photo finish

[Dean VP]

Heat = Watts = I squared x R =  I x I x R  = V x I . Since both the voltage
and especially the current is significantly lower, the heat generated is
significantly less

Dean VP
Apache Junction, AZ

Atheism is a non-prophet organization.

-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Carl Gogol
Sent: Sunday, November 24, 2013 11:29 AM
To: Antique tractor email discussion group
Subject: Re: [AT] photo finish

LEDs do not create a lot of heat in an absolute power sense, but the 
semiconductor junctions that allow them to work are very small.   One of the

larger engineering problems of making them even less expensive and longer
lasting is good thermal engineering design to remove the heat efficiently
from that small light emitting die that actually gets quite hot over its
small area.

-----Original Message-----
From: Dick Day
Sent: Sunday, November 24, 2013 11:45 AM
To: Antique tractor email discussion group
Subject: Re: [AT] photo finish

LED's draw so few amps, I cannot imagine that they get very hot. It's a
sealed unit, no air vents. Those are heat sinks, not sure why they are
there. Possibly the same case is used for other types of lights, not sure.

--------------------------------------------------
From: <jtchall at nc.rr.com>
Sent: Sunday, November 24, 2013 7:26 AM
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Subject: Re: [AT] photo finish

> I just added one rectangular light to the combine for the unloading 
> auger, I swear you can stand in the back of the truck and read a book! 
> I've still got the box it came in, don't know if its Halogen or LED, 
> or what the current draw is. I'd like to be able to find a replacement 
> for the sealed beams so the tractor will still look original, but if I 
> keep needing to use it at night, the original lights may be pulled off 
> and stored away!
>
> That looks to be a pretty good price on the units you installed. I 
> noticed what appears to be air fins, does it seem to run pretty hot?
>
> John
>
>
> -----Original Message-----
> From: Dick Day
> Sent: Saturday, November 23, 2013 10:24 PM
> To: Antique tractor email discussion group
> Subject: Re: [AT] photo finish
>
> John, speaking of lights...
>
> Last year, one of the back cab lights on my NH broke off as I was 
> going through some trees. I ordered a set of LED's to replace the back
lights.
> The link below takes you to the lights I bought. When I received them, 
> I decided to test them out in my shop. The second I hooked one up to a 
> spare 12-volt battery, I was nearly blinded. They draw hardly any amps 
> and the light cases are very heavy duty. They are so good, I removed 
> my front cab lights and installed these and moved the old front ones to
the rear.
>
> The amazing thing is that they cost about $23 each.
>
> http://www.amazon.com/gp/product/B009AQTOP2/ref=oh_details_o06_s00_i00
> ?ie=UTF8&psc=1
>
> Dick
> --------------------------------------------------
>
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