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I have experieced for the LED Grow Light when i bought from houyi . http://www.aliexpress.com/store/134227 They are their online shop with very competitive price . i have the 40x80cm tent and used 4x75w cob integrated grow light . it works well for flowering . hope it will get the good...

Is there anybody tested or compared GEHL LED Grow light to Houyi light under same power ? Because i talked with 2 companies in July and find the GEHL price is 40% higher than HOUYI . If so ,why not choose the houyi light ? such as 1 square meter , if you use 2pcs houyi light . 1pc is 4x50w...

Hi Guys , After searching on google . find below information. COB COB (Chips on Board) , is a new technology of LED packaging for LED light engine. Multi LED chips are packaged together as one lighting module. When it light up, it looks like a lighting panel.. Why COB? --Background...

http://www.aliexpress.com/store/product/professional-factory-6-mixed-full-spectrum-675w-COB-Reflector-led-hydroponic-light-for-greenhouse-growing-VEG/134227_1245485465.html

hi llianius , if you want to compare the GEHL to the Houyi . I think it depends on your final expectation. Such as if you did not pay attention to the prices. You may choose the large power 9x75w cob reflector design with higher Par and lux than their Gehl 575w . But i found houyi get patent...