ChilLED grow light

Enigma

Enigma

Well-Known Member
I don't understand how you could be confused on this.

No problem, the lights we actually be here early!
 
tstick

tstick

Well-Known Member
Im terms of lighting and heat, isn't heat actually the result of a poorer conductor of electricity? Like, a space heater has a coil in it that glows red-orange when it's on....so it's putting out SOME light....but the conductor is so poor that it mostly just produces heat.....mostly...

But, even though a space heater can be set to produce the same amount of heat as an HPS bulb, you simply can't grow a cannabis plant under the light output of the space heater....like duh! ;) So plants can convert photons to heat, but they can't convert heat to photons.....OR CAN THEY?????
 
Enigma

Enigma

Well-Known Member
It isn't that something is poor or not, it does the job intended.

For your example, the heater puts off a little light while producing a lot of heat. HID are the other way around.

Idk, sometimes I think people smoke too much and they can't hold on.

A wise man once said, "you shouldn't do drugs that are harder than you."
 
ganjamystic

ganjamystic

Well-Known Member
Enigma said:
...For your example, the heater puts off a little light while producing a lot of heat. HID are the other way around....
Click to expand...
the space heater/HID comparison is a perfect example of what I'm saying about the law of conservation of energy and the first law of thermodynamics. a 1000W space heater and a 1000W light will ultimately produce the same BTUs of heat in a sealed room.. the space heater will convert little to no electrical energy to visible light and will convert most of that 1000W to heat without converting it to light first. the HID will convert something like 30-40% (right? is that how efficient HIDs are?) of that 1000W to light initially and the rest will be converted to waste heat. HOWEVER, the 30-40% or whatever that is converted to light will still ultimately end up as heat because those photons do not disappear, they heat up everything they bounce off of and are absorbed and released by in the sealed space, including the plants, the walls, and every other surface/object in the room..
 
Last edited:
ganjamystic

ganjamystic

Well-Known Member
A basic understanding of the 1st Law of Thermodynamics is essential to understand energy flow in buildings. Energy exists in many forms, such as heat, light, chemical, kinetic (mechanical) and electrical energy. The 1st law of thermodynamics states the law of energy conservation.

Energy can be changed from one form into another, but it cannot be created or destroyed.
...

The full statement of the 1st law of thermodynamics was first made in the 1850s and until today, it has never ever been proven wrong.

This law is not only applicable to building science, but it is applicable to the entire universe; from a molecular level to the stars, planets and galaxies.
...

...we will use the 1st law of thermodynamics to dispel a few building myths that hinder the understanding of energy flow in buildings. Here are some of the common myths:

Only a fraction of the electrical lighting energy used ends up as heat in the building
MYTH – A 100 watt light bulb only produces 50 watts of heat in the building

TRUTH – A 100 watt light bulb produces 100 watts of heat in the building
...

Depending on the efficiency of the light bulb, a part of the electrical energy is converted into light energy, while the rest of it is immediately converted into heat energy. The light energy is then absorbed and rejected by its surroundings (depending on its colour) until it is fully absorbed by the building furniture and materials. The absorbed light energy is then converted into heat energy in these building materials. That is why a dark coloured material is always warmer than a light coloured material when it is exposed to light energy. Basically dark coloured materials absorb more light energy than light colours. This heat is then removed by the air-conditioning system. The only situation where this myth may have some truth is when the light is directed out of the building. In this situation, part of the light energy produced by the lamp ends up outside the building and would not contribute 100% of the electricity used as heat within the building.
Click to expand...
(http://www.nicchinandpartners.com/local-buzz/first-law-of-thermodynamics/)
 
BobCajun

BobCajun

Well-Known Member
When excess light hits plants, they transpire. Evaporation absorbs heat. If it was a sealed container, the transpired water would recondense, giving that absorbed heat back. But since we exhaust the moist air, it doesn't recondense in there so net result, heat is removed. However, because in high temps the plants must transpire more water to cool itself, they also pull up more nutes, which can lead to toxicity. Kind of delicate balance. That's why people who blast their plants with light and have big circ fans blowing on them often get nute burn, even using recommended nute concentrations.
 
hillbill

hillbill

Well-Known Member
Empty tent or tent with plants that are harvesting photons to do the "work" of growing? Is there a difference?
 
hillbill

hillbill

Well-Known Member
I used to run an HID in the winter to keep my soil mix warm which replaced LEDs of similar wattage or a bit more but the soil I'm my pots was much warmer. I now import central heat/AC with all COBs and LEDs.
 
Enigma

Enigma

Well-Known Member
tstick said:
One of my new theories is that the light is right when a cat comes and lays down under it! I swear...No one needs to sphere test anything...just put a cat in a room with a few different grow lights...whichever one the cat lays under is the one that will grow plants the best!
Click to expand...

MJ is like cat nip, those little bastards love chewing on it.

The feline is just looking for warmth, which ever light gives off the best radiant heat will do.
 
xX_BHMC_Xx

xX_BHMC_Xx

Well-Known Member
ganjamystic said:
(http://www.nicchinandpartners.com/local-buzz/first-law-of-thermodynamics/)
Click to expand...
Don't you have to consider how efficiently the energy is converted into heat once it has served it's initial purpose? For instance, in that article they use the example of a water pump. They say out of a hypothetical 100w pump, 40w goes right to heating the pump room, the other 60w goes to heating the water through friction. Let's say this pump is submerged, not in a room. Now take a hypothetical 100w water heater, 60w goes to heating the water, 40w is first converted to light, then heat. I find it hard to believe that the pump would be nearly as effective at heating the water as the heater. Any thoughts?
 
sallygram

sallygram

Well-Known Member
I really was hoping someone would post something about using liquid to cool their system on this thread... Instead this is what I get:

1. Growmau5 is a fucking saint (I knew that)
2. Marijuana growing makes some people dicks (I don't think smoking does that)
3. Hort-Hydro-76 has an awesome light but needs to take back this thread and post some pics
4. Chilled is currently out of my price range
5. Some people pay way too much for COBs
6. Blurpies suck (Already knew that)
7. For the most part the RIU advertisers seem more about helping us then making money
8. I am happy I only have cancer and not chronic dickheadness

Sorry to hijack the thread but it seems to be going nowhere and I would really like to see more on thermal management from the people who own the boards and use them.
 
CobKits

CobKits

Well-Known Member
sallygram said:
Sorry to hijack the thread but it seems to be going nowhere and I would really like to see more on thermal management from the people who own the boards and use them.
Click to expand...
i havent setup the chilled board i bought yet but the heatsinks they sell are high quality. they are extrusions but not your typical heatsinkusa fare. they are milled flat and the top fins are relieved for some holes for presumably hanging (or maybe mounting inside of their enclosures
 
R

Ryante55

Well-Known Member
CobKits said:
i havent setup the chilled board i bought yet but the heatsinks they sell are high quality. they are extrusions but not your typical heatsinkusa fare. they are milled flat and the top fins are relieved for some holes for presumably hanging (or maybe mounting inside of their enclosures
Click to expand...
Aren't the holes for water cooling? I don't have a heatsink yet but I remember him saying it had holes for water cooling
 
Growmau5

Growmau5

Well-Known Member
BobCajun said:
I don't actually get information about lighting from videos much. I just go to the actual sources myself, meaning the manufacturer data sheets usually. I did watch plastic head's videos when he first started making them and I first started learning about LEDs for plant growth, but anyone but a total noob wouldn't get much out of his videos, the early ones or the recent ones. There's plenty of other channels with info on grow LEDs though. Not gonna list them all, too many. His channel is okay I guess just nothing special. The mouse thing is obviously just lame though. What the hell does a mouse have to do with growing weed?

Actually I can think of a better channel right now, RealStyles. And if you followed plastic head's forum threads long enough you'd see that every now and then he reveals his dickness. Usually conceals it so people don't know, but like GanGreen, he can't suppress it for long. Both of them are types of people I just can't stand, pretentious pricks. Do I ever ask people not to post on my threads? No, because I'm not a pretentious prick who thinks their threads are fucking solid gold. You ever take a good look at GanGreen? Guy like that, on the street, knock him cold in a second if he took that attitude with me. I mean nerdsville. Just be laying on the ground in a fetal position, probably convulsing. And plastic head? Guess where that mouse head would be stuck. Another fucking nerd who thinks he suddenly got cool because he grew weed. Don't work that way. They're just nerds who happen to grow weed.
Click to expand...
Ouch. My plastic head is reinforced with twill weave carbon fiber btw.
 
Last edited:
You must log in or register to reply here.
Top