Minus what the plant uses. It's a fraction of the fraction of energy emitted as light, but hey, plants don't materialize out of thin air without some energy input.
Unless you have your cobs in a water or air cooled fixture your talking out your ass
Talk out my ass eh? I laughed because there is no such thing as "hid runs cooler then cobs"... Its HIGHLY subjective to how you have it set-up which makes me think its YOU who talks out his ass.Unless you have your cobs in a water or air cooled fixture your talking out your ass
It's just important that peeps unfamiliar don't fall for the bs of LED=NO Heat.
Exactly. But without it theres no contest.
Don't confuse the noobs. Almost all of the energy absorbed the by plant goes directly to heat, and the small percentage that does go to carbon assimilation is mostly burned in respiration. Only a small portion of the energy absorbed in photosynthesis will end up as bonds in structural carbon.
If you use a lamp that dissipates 300W, it will produce 94W more heat than a lamp that dissipates 204W. Temperature has more to do with, surface area, air flow and ventilation.
"Don't confuse the noobs" with your pseudo botany thermal dynamics. You're assuming full spectrum sunlight (good for half the loss), a for horticulture inefficient and too high blue spectrum (lol... good for at least 10-20% of the loss) and some average crop with inefficient structure, which cannabis is not. Respiration also takes place during the dark period...
Strawman
He was obviously talking about the effect on the plants and not the cooling requirements. It's your neverending ignorance about light is heat and biased interpretation of photosynthetic efficiency that is misleading.
Hey airwalker, one of the ppl who is nice and actually answers my questions told me to put you on ignore. LOL I am never going to see a message from you again.
I can't do that because I have absolutely no idea about electricity and DIY stuff. Thank you for the advice.
You sound like a really smart guy. You have a very good vocabulary. Anyway I'm growing in a closet and an hps would make the temp go over 100 degrees most likely."Don't confuse the noobs" with your pseudo botany thermal dynamics. You're assuming full spectrum sunlight (good for half the loss), a for horticulture inefficient and too high blue spectrum (lol... good for at least 10-20% of the loss) and some average crop with inefficient structure, which cannabis is not. Respiration also takes place during the dark period...
Strawman
One obviously won't need the same amount of watts with led to get the same amount of light as hps... thought you would have figured that out by now, yet you're still blindly comparing watts to watts to insist on not being so awfully wrong. Try comparing led to hps btu/umol instead of pretending led and hps are both synonymous with watts.
Thank you for your reply, I think heat won't be a problem. At this point I just want to know how much faster a good led can grow a plant. When I use cfl's they grow so slow, so I think if I get an led it could take a couple weeks off the time for harvest.
Wow... language gap... I've made it pretty clear in the past that you need fewer watts with modern leds than with HPS. That doesn't change the fact that a watt is a watt. The OP asked if 300W would produce less heat than 204W and the answer is no... 300W will produce 94W more heat than a lamp that dissipates 204W."Don't confuse the noobs" with your pseudo botany thermal dynamics. You're assuming full spectrum sunlight (good for half the loss), a for horticulture inefficient and too high blue spectrum (lol... good for at least 10-20% of the loss) and some average crop with inefficient structure, which cannabis is not. Respiration also takes place during the dark period...
Strawman
One obviously won't need the same amount of watts with led to get the same amount of light as hps... thought you would have figured that out by now, yet you're still blindly comparing watts to watts to insist on not being so awfully wrong. Try comparing led to hps btu/umol instead of pretending led and hps are both synonymous with watts.
