Olive Drab Green
Well-Known Member
i.e. Electroluminescence vs. FluorescenceNo, you feel SOME of them as heat, and the proportions are different with different lights due to how they convert the electrical energy into something else.
i.e. Electroluminescence vs. FluorescenceNo, you feel SOME of them as heat, and the proportions are different with different lights due to how they convert the electrical energy into something else.
Indeed.i.e. Electroluminescence vs. Fluorescence
This was always my point, regarding gas discharge lamps vs. COBs/LEDs generally.Indeed.
And, of course, incandescence.
You'll be able to hold a 50w LED lamp in your bare hand when it's "on", let's see you do that with a 50w halogen as so much more of the electrical energy is turned to heat.
Which some people do not seem to have a grasp on yet, but that will come.This was always my point, regarding gas discharge lamps vs. COBs/LEDs generally.
Yet the fact is that both will heat up a closed room at the same pace. Laws of thermodynamics apply here.As someone said earlier, what heats up a room faster, a 1kw heater or a 1kw HID light? They both convert the same amount of electrical energy into something else, but one will generate more heat than the other as with one there isn't a large proportion of that 1kw of electricity being converted into light energy.
Your ac just does not need to run or cycle on as much with the lower btu output of the more efficient leds/lights.That would account for the rise in humidity. It has nothing to due with this ncreased plant transpiration. Evaporator cores not only collect heat from the air. They also collect moisture.In my system, during the day the ac does double duty removing both heat and humidity.
My point is as lights get more efficient and 1000w is 3400 BTU/H no matter if its one photon or a billion.
As the number of photos increases and the BTU's stay the same, my AC works about the same... maybe a little harder with wetter air but still, forget that for my point.
The RH will increase with better lights
Dear oh dear, it still hasn't sunk in yet.Yet the fact is that both will heat up a closed room at the same pace. Laws of thermodynamics apply here.
There can be a difference in how easy it is to extract the generated heat from the space (radiant vs convection heat), but the efficiency of the light truly has no noticeable effect on the room heating up.
I get that it can be difficult to comprehend concepts like this, but try at least.Dear oh dear, it still hasn't sunk in yet.
What do you think happens with that light when it gets absorbed? Laws of thermodynamics baby!If one thing converts more of that 1kw of energy into light than the other, with the other converting more energy into heat than light, how in hell's name will they heat a room up at exactly the same rate as the conversion of energy is completely different with one converting more energy into light compared to the other?
I give up, you've proven you don't understand what you are talking about and have no intention of trying to do so.I get that it can be difficult to comprehend concepts like this, but try at least.
What do you think happens with that light when it gets absorbed? Laws of thermodynamics baby!
All the energy you pump into that closed space ultimately gets converted to heat. Even when you add plants, since only a very small portion of the light gets converted in biomass.
The law of the conservation of energy applies here.Yet the fact is that both will heat up a closed room at the same pace. Laws of thermodynamics apply here.
There can be a difference in how easy it is to extract the generated heat from the space (radiant vs convection heat), but the efficiency of the light truly has no noticeable effect on the room heating up.
Depends upon the type of watts. When an LED consumes electrical watts, the electrical watts are dissipated as radiant watts (light) and heat. The ratio between radiant watts and heat equates to efficacy (watts or lumens per electrical watt).
And no, there is no such thing as too efficient.
If your light source were more efficient you would generate less heat. Less heat = lower temperature. Lower temperature means less RH because air cannot hold as much water at lower temperatures. Efficiency is your friend, more is better.
That's a good point. And would depend on ambient temperature in the tent from one light type or source to another.So i might be wrong...
But the the temps being lower, and cold air dissolves less water than hot air: the amount of water being transpired by the plants being the same, just for examples sake, wouldnt there be a lower RH when the air is warmer? For example, 5 liters of water disolved in 15C would give a higher RH than the same 5 liters disolved in 25C as it Relative Humidity. This how i thought dew point, foggy windows in the winter etc worked.
I know in a grow room its a bit different cause the plants will transpire differntly with different RH/Temp/VPD: changing these factors would prob mean that those 5 liters of the example wont be the same.
I'll put it simply.That's a good point. And would depend on ambient temperature in the tent from one light type or source to another.
You get the foggy windows because of a sharply lower temperature on the window, which means the air condenses which increases the density of the air. That means more water vapour, which then collects on the colder surfacedue to the rh being higher as more air occupies the same volume.So i might be wrong...
But the the temps being lower, and cold air dissolves less water than hot air: the amount of water being transpired by the plants being the same, just for examples sake, wouldnt there be a lower RH when the air is warmer? For example, 5 liters of water disolved in 15C would give a higher RH than the same 5 liters disolved in 25C as it Relative Humidity. This how i thought dew point, foggy windows in the winter etc worked.
I know in a grow room its a bit different cause the plants will transpire differntly with different RH/Temp/VPD: changing these factors would prob mean that those 5 liters of the example wont be the same.
The rest of the heat is on the heatsink on the back of the light whick is still in the room... And a 1k will heat the room up the same as a heater of the same wattage if the room is sealedNo, you feel SOME of them as heat, and the proportions are different with different lights due to how they convert the electrical energy into something else.
Hold a 50w cob with no heatsink...good luck with that.Indeed.
And, of course, incandescence.
You'll be able to hold a 50w LED lamp in your bare hand when it's "on", let's see you do that with a 50w halogen as so much more of the electrical energy is turned to heat.
Your going to feel pretty stupid when you finally figure out your wrong. But don't feel bad I used to think the same thing until I did some research/ real world testingI give up, you've proven you don't understand what you are talking about and have no intention of trying to do so.