Hemaphrodite for a year,please help

harrychilds

harrychilds

Well-Known Member
PJ Diaz said:
I can understand your reluctance to accept this fact, because I used to think the way you do. After extensive research as well as my own real world side by side comparison, I guarantee you that the total heat produced by HID vs LED is the same, assuming the watts burned are the same.
Click to expand...
So you're saying a 600w led will heat up a tent in the same way a 600w HPS does? and increase the temps to around 28 Celsius like a HPS does? Because that's not what I'm getting from my research and results.
 
harrychilds

harrychilds

Well-Known Member
Boatguy said:
yes. watt for watt they are equal
The led can produce more light for the watts used, but not less heat per watt
Click to expand...
I totally agree with you in the sense that LEDS can produce more light. But in my mind I believe they give off less heat. And it certainly feels that way when I touch the LED bars
 
PJ Diaz

PJ Diaz

Well-Known Member
harrychilds said:
So you're saying a 600w led will heat up a tent in the same way a 600w HPS does? and increase the temps to around 28 Celsius like a HPS does? Because that's not what I'm getting from my research and results.
Click to expand...
Yes it will heat the tent the same, but it will heat the plants differently.

check out the heat specs on a Gavita, which interestingly equals the wattage times 3.41:https://scotts-hawthorne-public-prod.s3-us-west-2.amazonaws.com/PROD/documents/Documents/V4_906056_Gavita_1700LED_Spec_Sheet.pdf
 
harrychilds

harrychilds

Well-Known Member
PJ Diaz said:
Like I said, the difference is how the heat is disbursed.

Here’s some info to look into: https://en.m.wikipedia.org/wiki/British_thermal_unit
Click to expand...
To be fair, I totally agree with you. And I am wrong. The tests and research I did on my light were with a dimmer switch, dimmed down to 25% so that's probably why I didn't notice any heat. and the fact the light is spread out. I believe dimmed down to 25% the led bars are only pulling 20watts each :bigjoint:
 
PJ Diaz

PJ Diaz

Well-Known Member
harrychilds said:
Yeah man, maybe they just feel cooler because they are 100watt bars, instead of 600watts of High pressure sodium all in 1 bulb.
Click to expand...
Like I said, years ago I didn’t want to believe this either so I tested for myself. I hooked up a 400w hps, measured the power out put at the plug (I think it was around 435w total power draw), then I turned off all ventilation and let it run in a small tent for an hour and measured the temp at the top of the tent. Then I took the fixture out and put a LED fixture in it’s place, dialed it to the identical wattage, and let it run for an hour. Yes I did let the tent cool down to the same starting control temp first. After an hour of running the LED at the same wattage, guess what? Exact same temps. Try for yourself if you still don’t believe.
 
harrychilds

harrychilds

Well-Known Member
PJ Diaz said:
Like I said, years ago I didn’t want to believe this either so I tested for myself. I hooked up a 400w hps, measured the power out put at the plug (I think it was around 435w total power draw), then I turned off all ventilation and let it run in a small tent for an hour and measured the temp at the top of the tent. Then I took the fixture out and put a LED fixture in it’s place, dialed it to the identical wattage, and let it run for an hour. Yes I did let the tent cool down to the same starting control temp first. After an hour of running the LED at the same wattage, guess what? Exact same temps. Try for yourself if you still don’t believe.
Click to expand...
Yeah man, I totally agree with you. Ventilation is another factor and the fact I was only running my light at 25%, which spread between 5 led bars is only around 20 watts each, Turned up full blast with no ventilation, those temps are going to rise so I totally agree with you dude :)
 
PJ Diaz

PJ Diaz

Well-Known Member
harrychilds said:
Yeah man, I totally agree with you. Ventilation is another factor and the fact I was only running my light at 25%, which spread between 5 led bars is only around 20 watts each :)
Click to expand...
HPS will make your plants heat up more because of the radiant heat, which is why it’s suggested to run ambient temps higher for LED vs HPS. What matters is the plant temps not the room.
 
harrychilds

harrychilds

Well-Known Member
PJ Diaz said:
HPS will make your plants heat up more because of the radiant heat, which is why it’s suggested to run ambient temps higher for LED vs HPS. What matters is the plant temps not the room.
Click to expand...
There's a lot of equipment you need to do it properly, I've just spent about $3000 dollars on a 4x4 setup, humidifiers, dehumidifiers, premium gorilla grow tent, led light, $250 in house genetics seeds. And what I've realized is I still need to spend more money on stuff like laser thermometers to measure the leaf temps. And I'm in two minds whether or not to keep winging it or just carry on saving up and buying new equipment lol :bigjoint:
 
PJ Diaz

PJ Diaz

Well-Known Member
harrychilds said:
There's a lot of equipment you need to do it properly, I've just spent about $3000 dollars on a 4x4 setup, humidifiers, dehumidifiers, premium gorilla grow tent, led light, $250 in house genetics seeds. And what I've realized is I still need to spend more money on stuff like laser thermometers to measure the leaf temps. And I'm in two minds whether or not to keep winging it or just carry on saving up and buying new equipment lol :bigjoint:
Click to expand...
You can do it for a lot less than that.
 
PJ Diaz

PJ Diaz

Well-Known Member
I can build a quality 4x4 grow tent will all necessary items of decent quality for $1k, no problem.
 
You must log in or register to reply here.
Top