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Can a light get too efficient

Discussion in 'LED and other Lighting' started by Uncle Reefer, Feb 9, 2018.

    Uncle Reefer

    Uncle Reefer Well-Known Member

    There must be exterior variables affecting your tents. This is a law and your tents wouldn't break the law, if they knew whats good for them ...
    Roger A. Shrubber

    Roger A. Shrubber Well-Known Member

    sure, i charge 60 bucks a 1/4 for it.
    i charge 20 bucks an hour for lessons in how not be a git
    Michael Huntherz likes this.

    Ryante55 Well-Known Member

    Half the heat of the led come off the back of the light so the heat is exhausted quicker at least that's my theory. Like if you put a heater next to an open window in your living room the room would stay cooler than if it were on the other side of the room.
    GreenLogician likes this.

    Cold$moke Well-Known Member

    I ran a 1000w in a 5x5x5 box in my cool basment for years air cooled. And a cold climate helps lol
    Uncle Reefer

    Uncle Reefer Well-Known Member

    That is valid, plus HPS throw out a Fuck ton of infra red, so it heats up what it hits far more than led.
    Sour Wreck

    Sour Wreck Well-Known Member

    lol, that made me giggle.

    there are in different rooms. i guess that could play a role.

    i would say give me a few months and they will be in the same room and they will be, but i am eliminating the use of tents in favor of 1 large flowering room so they will be in the same air environment soon.

    clones, seedlings and veg moving into a tent in another room.

    JavaCo Well-Known Member

    Dude you cant be fucking serious your going to charge me 20 dollar a hour to try to teach me nonsense, thinking I will pass. I mean your reply was copied and pasted out of google which the google part I could care less but it being false information I do care about. You really do need to look up the laws of thermodynamics son because you got it all wrong. Just cause some fucking website says it doesn't mean it is so. Bet the heat sink salesmen love you since efficiency doesn't matter lol https://www.led-heatsink.com/thermal-calculation
    Roger A. Shrubber

    Roger A. Shrubber Well-Known Member

    no, i didn't copy and paste...i had this same arguement, from your side, over a year ago, and got taught the truth...apparently no one has bothered to teach you yet.
    go do some more reading, go to the led forums and ask the guys who do this for a living, call up any electrical engineer in existance, and ask them.
    and since we're linking things...
    look at this and tell me where the separate calculators are for leds and hid? there aren't separate ones, because the laws of thermodynamics applies to everything everywhere, the same way. doesn't matter if its an led, and hid, a computer mainframe, or a fucking heat lamp....1000 watts of electricity produces 3400 btu an hour. period. doesn't make any fucking difference whats using the 1000 watts of power. none. a t.v is the same as a radio, is the same as a heater, is the same as an air conditioner.....if they use X amount of electricity, they produce X amount of heat.....
    try to get this straight, then get back to me.
    Uncle Reefer

    Uncle Reefer Well-Known Member

    ANd you know what will really blow your mind?? a 1000w airconditioner when you nulify the condesor and coil creates 3400 BTU's dun dun duuuuuuun!
    GreenLogician, 1212ham and Ryante55 like this.

    Ryante55 Well-Known Member

    You are correct but the heat can be moved from from the led easier because the heat is directed differently in the room. In a sealed room same heat. in a typical grow environment with lots of air movement it will be easier to cool led you can also run the room hotter with led. So yes you are correct but there are more variables to consider if your growing.
    Roger A. Shrubber

    Roger A. Shrubber Well-Known Member

    you are absolutely correct, this was stated earlier, and disparaged

    GrowLightResearch Well-Known Member

    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.
    Last edited: Feb 9, 2018
    mahiluana likes this.

    Ryante55 Well-Known Member

    That is not true a more effecient led produces more light not less heat. You can use less watts for the same light but heat per watt is constant as stated above.
    churchhaze and Randomblame like this.

    CobKits Well-Known Member Rollitup Advertiser

    that is a fantastic analogy, apart from the fact that LEDs are inherently more efficient
    Olive Drab Green and Ryante55 like this.

    ANC Well-Known Member

    Yes, one needs to factor in the methods of heat transfer, i.e. conduction, friction, radiation, convection.... to find the temperature points in a room, but overall you need to calculate W used by everything right down to the fans in your room into your cooling requirements.

    wietefras Well-Known Member

    Apart from the fact that you don't understand the laws of thermodynamics. The other part of your post also makes no sense.
    I'm guessing you mean "lower" RH instead of "less" RH, but it's exactly the opposite of course. If the same absolute amount of water is in the air and the temperature is lowered then the RH actually goes up.

    It's amazing, but whatever you say, reality is always the opposite of what you seem to think it might be.

    You have been told over and over, but seriously just do it. Build yourself a fixture and actually try to grow some plants instead of throwing around this nonsense.

    1212ham Well-Known Member

    No way. Type of watts? Please list the types. 1kwh = 3412.142 BTU.
    Ryante55 likes this.

    1212ham Well-Known Member

    I can feel those radiant watts (light) as heat.... something to think about.
    churchhaze likes this.

    Fubard Well-Known Member

    And that does not account for what all these watts are converted into. How much into light, how much into heat, etc.

    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.

    And if a 1kw led kicks out more light energy and less heat than a 1kw HID, then the 1kw LED will have a different effect on temperatures, etc. It's all about what that 1kw of electrical energy is being converted into, which is where simplistic "1kw equals this no matter what" falls over.

    Fubard Well-Known Member

    No, 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.
    Olive Drab Green likes this.

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