On Sat, May 23, 2020 at 09:22 AM, Brian Lamb wrote:
Agreed, the horse has heat, but in the case of lighting, the lumens is the ¡°work¡±, we get the same amount of lumens from 15 watts (LED) as we do 100W of incandescent. Put the 100W vs. the 15W in your box and the temperature rise will not be the same.
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Lumens is "work" only as metaphor, and by the same token, heating is also "work".? ?The "work" a heat lamp does is heating for example.
Ask yourself this: where did the light "work" go after the light is switched off?? You can't open the box and find the lumens resting on the bottom.
The lumens are just an intermediate place where the energy resides, in between the electricity in and the resultant heat.
At any instantaneous moment, the 100W LED will be doing more "light work" (brighter inside) and less immediate "heating work" than the incandescent, which will be doing less "light work" (dimmer) and more immediate "heating work".? ?
But then 100% of the lumens are absorbed into the walls of the box and the air in the box.
Another way of looking at it that a 100W incandescent and 100 LED inside a box (where you can't use the "light work)" are identical heaters.
