heating a 12x6 room?

The entire concept of light emitting diodes is that it is a cold creation of light with minimal heat byproduct. Your using watts to create light, heat is a byproduct.

Proof? Hmmm how about the countless LED grows (check over at 420mag, not many here) that do not employ the use of high cfm fans nor do they run into cooling issues. http://www.420magazine.com/forums/completed-journals/112728-led-grow-off-part-deux-xxx-vs-180w-ufo.html

that is one grow that measures the draw of the LED units, and talks about trouble keeping the temps UP (not down).

First hand experience? in my stealth cab

which runs on 4 23w cfls with no air movement it will climb to 130s

If i screw in one 13w vanity cfl and leave it on, the temps will climb to a bit under 100, but its slow.

if i put in my 15w Chinese led panel, temps stay at ambient (75-82) again with no fans on..

So yeahh....

Evidence at last.

LorDeMO said:

Do you??????

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Just google "BTU per watt hour". You'll get hundreds if not thousands of sources saying that 1 watt hour of electricity generates 3.4 BTU of heat.

karr said:

The entire concept of light emitting diodes is that it is a cold creation of light with minimal heat byproduct. Your using watts to create light, heat is a byproduct.

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Yes they might generate less heat in the creation of light, but the light simply turns back into heat when it's absorbed. If the light didn't convert to another form of energy, you could just turn on a bulb for one second and the room would stay bright for hours.

Proof? Hmmm how about the countless LED grows (check over at 420mag, not many here) that do not employ the use of high cfm fans nor do they run into cooling issues.

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I've checked out a lot of LED grow threads in the past, and they all are low wattage. The lights used in the link you gave use less than 200 watts, and they're recommended to be used at significantly less watts per square feet than HID or other types of lighting. Not to mention that LEDs typically use less wattage than what they're advertised as. You'd have to hook up a wattage meter to see exactly what your CFLs and LEDs are using.

LED's produce 3.4 BTU's per hour. - this is called negligible
Incandescent bulbs produce 85 per hour. - this is a noticeable change in temperature.

to OP: if your room is inside, run an extra heating duct from the furnace. If the flow isn't that strong, get a booster from home depot or something.

Haha well thanks everyone that had helpfull ideas! I will have to try out multiple methods to see what will work, but all thre bickering about the LED heat is making me giggle. Why every time someone brings up LED a debate breaks out to try and bash on them?

Had my 200 watt stereo cranked in a enclosed room yesterday funny the temperature didn't change that much. I can't believe how so many people believe watts=heat. different light source are more efficient than others at convert power to light some ie hid have burning gasses=hot

Nope if it draws wattage it produces heat equal to the draw!

a load draws amps not watts. watts is volts X amps. Let say an electric motor draws 10 amps @ 120 volts=1200 watts, that motor is not going to produce as much heat as a 1200 watt heater will it? No because it turned most of it's energy consumption to mechanical energy and the by product was heat. the more efficient the motor is the less heat it produces. The same applies to lighting sources. If you say whatever you draw in watts is always equal to heat in watts, then why do we use electric heaters to heat our homes and not your washing machine!!

Haha bro I was kidding im on your side. Its redic to think that all forms of energ processed the same way have the same outcome. HEAT LOL THAT'S IGNORANCE

Ps I do use my washer to heat my house :S

Seems to me that someoe else already offered pretty good advice. If your using led's to save energy and increase stealth (less power consumption) but you have to run an eletric heater to use them it kind of defeats the purpose.

In regards to the same wattage of bulbs putting out the exact same amount of heat, that is an incorrect application of the 1st law of thermodynamics (matter or energy is never created or destroyed). 3 different bulbs using 5o watts will all consume 50 watts. How this energy IS CONVERTED is the difference. Bulb watts are converted into light AND heat ( their measure of efficiency) so a less effecient 50 watt incadescent (3% efficient) will put out 3% light and 97% heat. So the amount of the 50 watts turned into heat energy as opposed to light energy is much much higher than a more efficient led light.

Soooo ignoring lumen outputs and wavelengths of usable light etc etc etc. The more efficient the light bulb THE LESS HEAT it will put out at the SAME wattage. It's confusing to people but it's also kind of funny as they are marketed as more effecient bulbs which by definition means they create more light and less heat but yet, people still manage to fuck it up.

ya ill figure it out most likely ill just run an inlet fan from main level where heat is and suck in some that way! thanks tho im sure running like 5 45w leds in veg side and running 6-8 90w leds in flower room should keep it decently warm

kiddfarmer08 said:

Haha well thanks everyone that had helpfull ideas! I will have to try out multiple methods to see what will work, but all thre bickering about the LED heat is making me giggle. Why every time someone brings up LED a debate breaks out to try and bash on them?

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I wasn't trying to bash them. I've seen a number of grow threads showing LEDs matching or beating the same wattage HPS. Just pointing out that a watt is a watt of heat, regardless of what bulb type it is. Just trying to help people and clear up a common misconception. I hope your grow does well!

legallyflying said:

In regards to the same wattage of bulbs putting out the exact same amount of heat, that is an incorrect application of the 1st law of thermodynamics (matter or energy is never created or destroyed). 3 different bulbs using 5o watts will all consume 50 watts. How this energy IS CONVERTED is the difference. Bulb watts are converted into light AND heat ( their measure of efficiency) so a less effecient 50 watt incadescent (3% efficient) will put out 3% light and 97% heat. So the amount of the 50 watts turned into heat energy as opposed to light energy is much much higher than a more efficient led light.

Soooo ignoring lumen outputs and wavelengths of usable light etc etc etc. The more efficient the light bulb THE LESS HEAT it will put out at the SAME wattage. It's confusing to people but it's also kind of funny as they are marketed as more effecient bulbs which by definition means they create more light and less heat but yet, people still manage to fuck it up.

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I already pointed out why this reasoning is wrong, yet you still made this post to insult me. I don't understand why. You never explained what happens to all that light energy. What I was saying was, regardless of what % of energy gets converted to light, it all turns back into heat eventually anyway.

I could speculate a positive factor though - if the heat gets generated more on the walls of the grow tent/room (from the light), then it might radiate out of the grow area more easily, keeping the room cooler. Or if an LED yields twice as much per watt as an alternative type of light, then you only need half as much wattage for the same yield. (far less heat) On the negative side, air cooled hoods probably aren't as easy to set up with an LED.

Haha thanks man ill do my best to make her pretty!