Scientists Create 230-Percent Efficient LED Bulbs - LED Grow Lights - International Cannagraphic Magazine Forums

RaNgEr RiCk · 03-06-2012, 05:56 AM

Light bulbs have always required more electricity than they need to produce light because the energy conversion process—changing electricity to light—was inefficient. But an MIT research team has just shown that an LED can actually give off more light than what it consumes in electricity.
Incandescent bulbs are the poster child of inefficient energy conversion. The devices heated a filament with an electrical current which not only produced light, but a lot of waste heat as well. Fluorescent bulbs, CFL's, and even conventional LED's all generate the same waste heat to varying (albeit much smaller) degrees but none has ever reached 100-percent efficiency—a mark known as "unity efficiency."
The team from MIT posited that while the bulbs energy requirements decrease at an exponential rate (halving the voltage reduces the input power by a factor of four), the lumen output would decrease linearly (halve the voltage and the lumens drop by half as well). This means that at some point, the amount of lumens the bulb is emitting would be more than the amount of energy spent—essentially "free" light.
Granted, this point occurs only when using minuscule amounts of electricity to power incredibly dim bulbs. In their experiments, the team was able to generate 69 picowatts of light from just 30 picowatts of energy. They did so by harnessing waste heat, which is caused by vibrations in the bulb's atomic lattice, to compensate for the losses in electrical power. The device also reacts to ambient heat in the room to increase its efficiency and power the bulb.
This process cools the bulb slightly and could eventually be employed to manufacture "cold" bulbs that don't generate any heat, only light. And, since the same physical mechanism from these tiny bulbs can be applied to any LED, they likely will be.

https://gizmodo.com/5890719/scientist...ient-led-bulbs

PoopyTeaBags · 03-06-2012, 06:24 AM

imagine a grow with no heat..... nice find

Phaeton · 03-06-2012, 07:06 PM

I am not even going to bother, the information is included.

Read it again and think about it. Yup, that is correct.

I used to try and educate, but that is frustrating, amusement is much more appropriate.

setaemies · 03-07-2012, 07:53 AM

No worries, just upscale few trillion times

..might be a problem though if light absorbs few kW's worth of heat from the environment, you might find some frozen plants in the growroom

03-06-2012, 05:56 AM	#1
RaNgEr RiCk Member Join Date: Jan 2011 Location: Your moms house Posts: 431	Scientists Create 230-Percent Efficient LED Bulbs Light bulbs have always required more electricity than they need to produce light because the energy conversion process—changing electricity to light—was inefficient. But an MIT research team has just shown that an LED can actually give off more light than what it consumes in electricity. Incandescent bulbs are the poster child of inefficient energy conversion. The devices heated a filament with an electrical current which not only produced light, but a lot of waste heat as well. Fluorescent bulbs, CFL's, and even conventional LED's all generate the same waste heat to varying (albeit much smaller) degrees but none has ever reached 100-percent efficiency—a mark known as "unity efficiency." The team from MIT posited that while the bulbs energy requirements decrease at an exponential rate (halving the voltage reduces the input power by a factor of four), the lumen output would decrease linearly (halve the voltage and the lumens drop by half as well). This means that at some point, the amount of lumens the bulb is emitting would be more than the amount of energy spent—essentially "free" light. Granted, this point occurs only when using minuscule amounts of electricity to power incredibly dim bulbs. In their experiments, the team was able to generate 69 picowatts of light from just 30 picowatts of energy. They did so by harnessing waste heat, which is caused by vibrations in the bulb's atomic lattice, to compensate for the losses in electrical power. The device also reacts to ambient heat in the room to increase its efficiency and power the bulb. This process cools the bulb slightly and could eventually be employed to manufacture "cold" bulbs that don't generate any heat, only light. And, since the same physical mechanism from these tiny bulbs can be applied to any LED, they likely will be. https://gizmodo.com/5890719/scientist...ient-led-bulbs __________________ Medical Cannabis Test Results https://www.icmag.com/ic/showthread.php?t=243463 L.E.D https://www.icmag.com/ic/showthread....93#post5222993 Jedi Kush 4k (updated 9/18/12) https://www.icmag.com/ic/showthread....45#post5314845 MOMS Deathstar Jedi Kush (Deathstar x SFV OG) Sensi Star (pre 95) Sour Bubble Sour Strawberry Kush Phifty Caliber Kush [/size]
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03-06-2012, 06:24 AM	#2
PoopyTeaBags State Liscensed Care Giver/Patient, Assistant Trailer Park Supervisor Join Date: Apr 2009 Location: Man-Whorin' for Cheeseburgers Posts: 4,875	imagine a grow with no heat..... nice find __________________ Poopy teabags Soma and Grindhouse Completed https://www.icmag.com/ic/showthread.php?t=160996 Prophets actually get flowered out Completed https://www.icmag.com/ic/showthread.php?t=180811 LVPK and Reclining Buddha RDWC https://www.icmag.com/ic/showthread.php?t=199088 BAAAAM! Peanut Butter & JAAAAM!
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03-06-2012, 07:06 PM	#3
Phaeton Speed of Dark Join Date: Apr 2011 Location: Interior Alaska Posts: 1,554	I am not even going to bother, the information is included. Read it again and think about it. Yup, that is correct. I used to try and educate, but that is frustrating, amusement is much more appropriate.
	Quote 1 members found this post helpful.

03-07-2012, 07:53 AM	#4
setaemies Member Join Date: Sep 2011 Posts: 138	No worries, just upscale few trillion times ..might be a problem though if light absorbs few kW's worth of heat from the environment, you might find some frozen plants in the growroom
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