What are advantages of LED lights?

sakhalchea said:

Q. is it really true that it produces NO HEAT?
A. No! It does produce some, but it is truely insignificant!

Q.and if so why do i still need ventilation?
A. So the plants can "breath", they take in co2 and give off Oxygen.

Q. what are the advantages of a 600 watt LED compared to 600 watt HPS? im not taking about cost. im talking about the overall benefits of growing with LED.
A. With a 600 watt HPS, about 80% of the "light" you get is totally useless for photosynthesis. On the other hand (in theory, at least), the light LED's produce is virtually 100% usable by the plant for growth.
Light that is "usable" by the plant is called PAR light (Photosynthetically Active Radiation). Light that is not usable by the plant is just called "Wasted Money!".

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TheMightyS said:

But most LED systems really aren't there yet, i've done LED and CFL, and the difference i had was huge from the 2. However, i did have 4 shitty panels and was my first grow! So it could of been because of that, but tbh, i'd go with the HPS. The technology really isn't there yet on the LED's.

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