Complete BS! I have a PAR meter sitting right in front of me, and have done test on the Phoenix 14k bulb. There measurements they are stating the 250w MH is only putting out 390-450 PAR. My readings on the same bulb come out the right around 2000 PAR for that bulb out of water. HUGE difference. Then they go on to say the LED puts out 600 PAR, again, BS, I tested LEDs over the weekend and at most they will put out around 100 PAR each. My ACTINIC T5HO bulbs put out about 330 PAR each.
All I can say is.. since I have that same PAR meter they used in their tests and have independently run tests on some of the same bulbs, I can say with 100% certainty those test results are completely fabricated/lies.
I love how they have pictures showing the PAR meter and readings, but you have no way of verifying exactly which light is on/being tested from the pictures.
Now, I do think LEDs are going to be the lighting for the near future.. but I don't need someone exagerating the facts like that link does because it is only going to result in people trying it/failing and coming back saying LEDs are not good. They are, but you have to know exactly what your doing and right now it does take A LOT of LEDs to equal a MH.. the end cost for an LED array to equal the output of a MH is much more $. I am working on my own LED array, but only to replace my T5HO actinics, not replace my MH, which I think right now is a much better use for LEDs than to replace your entire lighting system with them.