On Mon, 9 May 2016 08:37:12 -0500, Leon lcb11211@swbelldotnet wrote:

On 5/9/2016 6:50 AM, Markem wrote:
On Mon, 9 May 2016 06:37:55 -0500, Leon wrote:


Spalted Walt wrote:
We report, you decide.

http://www.ledsmagazine.com/articles...duce-heat.html

https://en.wikipedia.org/wiki/Therma...igh-power_LEDs



Ok, So it seems that LEDS waste about 70% of the energy that they consume
and that energy becomes heat.

Unless they are IR LEDs

In so much that the typical LED, and all of the ones I have purchased, use
10% or much less energy than a comparable incandescent light I have not
witnessed any heat at all. My sampling has included 3-4 ribbons of LEDs,
multiple strings of LED Christmas lights all plugged into each other, and a
couple of out door 60 watt incandescent coach lights replaced with
equivalency light out put LED bulbs. The biggest consumers of electricity
of this sampling is 7 watts and even those might only be producing about
1/3 the amount of heat of a typical 7 watt incandescent light bulb.


Show me a single LED that consumed 180 watts by itself and I think it, the
LED itself and not the transformer or other involved electronics, will get
hot enough to equal a common 60 watt incandescent light bulb.

You will need more sensitve equipment than your fingers to actually
measure the heat produced. If you wanted to argue about it someone
could, but not me.



LOL.. which is why I mentioned that If my fingers feel no heat at all
there for the most part the LEDs that I have used produce no appreciable
heat.

I measure heat this way. I feel nothing, I feel a little warmth, I feel
something hot that I don't want to touch.

The 7 watt single bulbs get a little warm where the ballast/transformer
is located near the screw in base but the bulb itself only gets warm
when the sun shines on it. I leave these lights on 24/7 also.

The worst LED bulbs I have used were the C9 replacement for night
lights. It melted the plastic fixture, so they went in file 13.