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  • L.E.D. Argument Thread For Dummies:)

L.E.D. Argument Thread For Dummies:)

  • Thread starter Thread starter 1diesel1
  • Start date Start date Feb 11, 2021
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L.E.D. Argument Thread For Dummies:)

1diesel1 Feb 11, 2021 1,265 Replies 161,606 Views
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gorillaglueaaron

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#341
greenscholar said:
lol
Click to expand...
Top LEDs are 200+ lumens/w. Try to find any HPS that produces anything near that.
 
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Arwood

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#342
greenscholar said:
not if they are the same wattage.
Click to expand...
This site does a decent job of showing how wattage =/= heat output. http://reptileuvinfo.com/html/watts-heat-lights-lamp-heat-output.html

Different types of bulbs showing different temps. The site does say that not every bulb was true to its wattage, but it's pretty pretty obvious from their measurements that different technologies produced different temperatures
 
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SaintsSamilia

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#343
Arwood said:
This site does a decent job of showing how wattage =/= heat output. http://reptileuvinfo.com/html/watts-heat-lights-lamp-heat-output.html

Different types of bulbs showing different temps. The site does say that not every bulb was true to its wattage, but it's pretty pretty obvious from their measurements that different technologies produced different temperatures
Click to expand...
Totally unrelated sport or hobbie but the bowfishing world is loving the bringing about of led bulbs over hps for multiple reasons the heat being one of the top reasons being used. So yeah hps definitely has a higher heat signature than led
 
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SaintsSamilia

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#344
bowfishing leds is actually what led me to the grow lights of alibaba and shit tons of savings on bowfishing gear in general
 
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growsince79

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#345
gorillaglueaaron said:
Top LEDs are 200+ lumens/w. Try to find any HPS that produces anything near that.
Click to expand...
Thats why 100w led can replace a 150w hps. Almost 50% more lumens/ watt. So in the course of one flower cycle, the LED saves me $2.88 per light for a total of $8.64. That's almost $10 /lb. Unbelievable savings.
 
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Dirtbag

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#346
gorillaglueaaron said:
Top LEDs are 200+ lumens/w. Try to find any HPS that produces anything near that.
Click to expand...
Exactly. LED and HPS dont produce the same heat at the same wattage. HPS is less efficient at producing light from energy and produces a lot more heat comparatively at the same wattage.
 
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greenscholar

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#347
Arwood said:
This site does a decent job of showing how wattage =/= heat output. http://reptileuvinfo.com/html/watts-heat-lights-lamp-heat-output.html

Different types of bulbs showing different temps. The site does say that not every bulb was true to its wattage, but it's pretty pretty obvious from their measurements that different technologies produced different temperatures
Click to expand...
lol
 
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Dirtbag

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#348
growsince79 said:
Thats why 100w led can replace a 150w hps. Almost 50% more lumens/ watt. So in the course of one flower cycle, the LED saves me $2.88 per light for a total of $8.64. That's almost $10 /lb. Unbelievable savings.
Click to expand...

Not if you need to run a heater
 
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greenscholar

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#349
Lol real watts not equivalent.
 
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Anthem

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#350
greenscholar said:
It’s not logic a watt produces 3.41 btus. You can’t change this. 600 watt hps or 600 led produces the same heat.
Click to expand...
This is exactly what heat load calculators state. 1 watt = 3.41 btu's.
@Dirtbag, do you think a 600 watt HPS can be cooled with 3000 BTU's?
 
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gorillaglueaaron

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#351
Changing the subject a little bit but I'll still discuss efficiency.




Looking at this graph of lm301b (the most popular diode in LED grow lights at the moment), wouldn't it be worth putting our LEDs in a fan cooled hood? A 100 cfm fan is 15w so to make this worth the watts, we would need to use 1 fan per 300w light if it reduces the light temp from 60c-30c. Does this make sense to anyone?
 
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gorillaglueaaron

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#352
greenscholar said:
Lol real watts not equivalent.
Click to expand...
We're not talking about equivalent watts. Real watt to real watt, LEDs are far more efficient than HPS.
 
Last edited: Feb 13, 2021
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Anthem

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#353
gorillaglueaaron said:
Changing the subject a little bit but I'll still discuss efficiency.


View attachment 1091505

Looking at this graph of lm301b (the most popular diode in LED grow lights at the moment), wouldn't it be worth putting our LEDs in a fan cooled hood? A 100 cfm fan is 15w so to make this worth the watts, we would need to use 1 fan per 300w light if it reduces the light temp from 60c-30c. Does this make sense to anyone?
Click to expand...
All the old purples had fans FWIW
 
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greenscholar

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#354
Listen all im saying is when you say it "runs cooler than my hps or my cmh" of course it does if your using less watts at the wall. Maybe this link will help you all. https://pllight.com/how-led-and-hps-lighting-can-affect-air-and-leaf-temperature/

Atwood what you posted is useless think of the bulbs as a magnifying glass. Same wattage just focusing the light differently.
 
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gorillaglueaaron

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#355
Anthem said:
All the old purples had fans FWIW
Click to expand...
I'm talking about full on cooled hoods like HPS and HID.
 
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gorillaglueaaron

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#356
greenscholar said:
Listen all im saying is when you say it "runs cooler than my hps or my cmh" of course it does if your using less watts at the wall. Maybe this link will help you all. https://pllight.com/how-led-and-hps-lighting-can-affect-air-and-leaf-temperature/
Click to expand...
You're able to use less watts because less heat and more light is created.
 
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Edinburgh

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#357
We are all in this together, there is absolutely no reason to disparage anyone, there plants, or there set up, we all do the best we can with what we have available, try and help your fellow growers, people think cannabis is easy to grow bc it is a weed, the person who taught me allways said cannabis is the eayest plant to grow but one of the hardest to grow correctly and i grow African violets now thats hard, so if you cant help someone with friendly advice dont be mean, there is to much meanness in this world allready.
 
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greenscholar

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#358
gorillaglueaaron said:
We're not talking about equivalent watts. Real watt to real watt, some LEDs are far more efficient than HPS.
Click to expand...
THAT WAS FUN.
 
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3 balls

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#359
Holy moly. The ratio of mid to large grows vs. tent grows sure has flipped on this site. Seems like everybody's in a tent.
 
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Mr.GreenthumbOG

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#360
3 balls said:
Holy moly. The ratio of mid to large grows vs. tent grows sure has flipped on this site. Seems like everybody's in a tent.
Click to expand...
Tents are the most common.
and what better way to show legal hobby grows.
Dirtbag said:
Not if you need to run a heater
Click to expand...
with this arctic air I have never missed my HPS more. Was considering digging them out of the shop.
 
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Started Feb 11, 2021
Latest post Sep 14, 2025
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Forum L.E.D Grow Lights

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