is not nearly correct. you need to understand work and entropy. everything eventually radiates as heat - this is the background sound of the cosmos.
From another of my posts:
First Greetz. Luv the thread, love the goal, hope to join y'all soon in it. With this in mind my opinions of the subject and not any individual follow.
Actually the difference is WASTED energy.
Whoever said watts are heat, is right. Watts are also defined by V x A. Which is voltage and amperage's product.
Well, that would be the what is released convection-wise, and the light output flux. The LED to the heatsink...or HPS to air. So we get rid of the heat, almost all of it.
Although a lot of people mull around this question..I will just say it...once I say it..you will know I am the devilgoob.
The LED's put out usable light at two frequencies. The HID's put out light we can't see and also IR light, which heats up water.
What I mean is, the HID radiates light, the plant gets hot and acts as a heatsink and that's why even with it hood-cooled it still is warm. The plants act as radiators that get rid of the excess heat created by far-red heating of the plant.
So it's radiative warming, then convection off the plants.
From Wiki:
-Rotational transitions, in which the molecule gains a quantum of rotational energy. Atmospheric water vapour at ambient temperature and pressure gives rise to absorption in the far-infrared region of the spectrum, from about 200 cm-1 (50 µm) to longer wavelengths towards the microwave region.
-Vibrational transitions in which a molecule gains a quantum of vibrational energy. The fundamental transitions give rise to absorption in the mid-infrared in the regions around 1650 cm-1 (µ band, 6 µm) and 3500 cm-1 (X-band, 2.9 µm)
-Electronic transitions in which a molecule is promoted to an excited electronic state. The lowest energy transition of this type is in the vacuum ultraviolet region.
Here is a link of the frequencies more absorbed
http://upload.wikimedia.org/wikipedia/commons/8/8d/Water_light_absorption_coefficient.gif
You did good son.
https://en.wikipedia.org/wiki/Watt
One watt is the rate at which work is done when an object's velocity is held constant at one meter per second against constant opposing force of one newton.
In terms of electromagnetism, one watt is the rate at which work is done when one ampere (A) of current flows through an electrical potential difference of one volt (V).
Two additional unit conversions for watt can be found using the above equation and Ohm's Law.
Where ohm () is the SI derived unit of electrical resistance.
Examples[edit]
A person having a mass of 100 kilograms who climbs a 3-meter-high ladder in 5 seconds is doing work at a rate of about 600 watts. Mass times acceleration due to gravity times height divided by the time it takes to lift the object to the given height gives the rate of doing work or power.[notes 1]
A laborer over the course of an 8-hour day can sustain an average output of about 75 watts; higher power levels can be achieved for short intervals and by athletes.[1]
A medium-sized passenger automobile engine is rated at 50 to 150 kilowatts[2] – while cruising it will typically yield half that amount.
A typical household incandescent light bulb has a power rating of 25 to 100 watts; a similar amount of light would be produced by fluorescent lamps at 5 to 30 watts, or LED lamps at 5 to 20 watts.
A typical coal power station produces around 600–700 megawatts. A typical unit in a nuclear power plant has an electrical power output of 900–1300 megawatts.
better - yes better.
We are talking in terms of work. The work the ballast on the led/hid does. when it does conversions of energy inefficiently, we feel it get hot.
When our LED's run and they get hot they push heat to the top and fans blow it away.
When our HID's get hot they radiate a lot of heat.
The point is WHAT that energy goes into. Atoms can absorb photons. Sometimes they give off a photon as well. sometimes no chemical work can be done by the incoming photon and its energy gets wasted in normal kinetics.
It all goes to heat eventually, but the point is that not all of it has to.
If led's push 90% of their energy directly into the area the plants can use, and have a dense canopy to radiate at, it makes complete sense that this TARGETED radiation would be more effective per watt than HPS. good ballasts with good led's SHOULD have less waste heat based on an equal pull @ the wall.
But as other systems bleed - some of this heat gets released back.
Its called entropy.
namaste~
