Led grow light

How is led grow light?
Has any friends test it?How is goes?

I am interests in the 50W led grow light on ebay, here is the link:http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=180350003940&category=42225QQ_trksidZp3907.m263QQ_trkparmsZalgo=SIC&its=I%2BC&itu=UA%2BIA%2BUCI&otn=15&po=LVI&ps=54

Should I buy it?

What does this mean, from the website:

"
Notice: Please turn on the panel at least 15 minutes after turning off . "


Actually, thats not that bad of a deal, the 2 for 140.


I like this panel more than any other I've seen from china...


The 21v supply looks nifty too... no mystery there.

sen led is a very good brand of leds i ave done some research and they seem to have a very good reputation a friend did buy one of their panles it is very good for cloning but you would wnt a heatin mat with the lack of heat produced by these panles it takes awhile for clones to root

Looks absolutely identical in appearance to the 55w triband I just bought, same finish and everything. For a R+B unit it has a higher than normal ratio of blues to reds, which is cool.

A couple warning flags for me personally about this listing though:

1) They don't list the exact red or blue spectrums. This is a dealbreaker imo as the wrong spectrums = wasted money.

2) They are using lux measurements to sell leds, which I just don't understand and makes me question their knowledge of growing any type of plant under their product. lux measurements are heavily biased towards green light, so why would a company use a wide spectrum test (that covers 400nm-700nm) when we are only measuring two VERY narrow bands of red and blue light? Green light (which is not in your garden or their product) and the color green in general excite the human eye the most which means if we have all the wavelengths of light with an equal amount of energy, green will produce the highest output on your retinas. This is the reason lux measurements are so biased towards green. lux by definition is the amount of light created by a candle at a distance of 1 meter...you could try hard and not find a more flawed measurement for LED grow lights.

Just my 2 cents on that marketing bs.

Thank you friends!!
To your advice, I think I should buy 4 units.

Does anyone used the panel?

Notice: Please turn on the panel at least 15 minutes after turning off . "

I think that means when you turn off the panel, you better turn it on again after 15 minutes.

I will let you know the resoult.

if you have some extra money you can get an led ufo which works amazing, and you can pick them up as little as 250$, all the light spectrum u need for veg and flower

My friend told me that ufo light can be burnt easily once the fan is broken.

Is that true?