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Glad someone know me. Why I am not recommend multiple burners in one glass tube ? First, the size of burners are not exactly same, maybe 314w, maybe 316w. It is no problem to work with single burner, but if connect 2 or 3 together, the low power burner will be brighter than high power burner...

1000w work with 2x 450w TOTO burner, surely the lifespan will short. I don't know that ballast is LF or HF, so far as I know, there is no stable low frequency 1000w ballast on the market, high frequency ballast has the risk to crack the bulb. 315W CMH is reliable bulb, don't buy those 3x 315w...

In fact those brand are sell same item with same burner.

Those burners are 450w from TOTO, 2 burners just 900w. However they can work under 1000w but the lifespan will lower.

I have collected some useful data to check the differences between cheap one and real one, see attached.

Once I see their long burner, i know that's not real grow light. Such long burner usually used to make street light, high lumen but low PAR, the 660nm red light just half if compare the real HPS DE grow light.

Test 3 1000w DE in integrating sphere, you will find which one contain more PAR and blue light rate.

The Netherlands new law on 2013 stopped Philips supply grow light to Cannabis market. In order to avoid trouble, Gavita have to switch the supplier. But how Netherlands GOV know we buy greenpower DE for greenhouse or indoor grow? It is easy to say but hard to control it.

Gavita purchased DE from Philips before, but after 2013 because of that law they started by from USHIO, that's why the structure is same as USHIO. And USHIO DE OEM by Germany BLV.

That's true, EYE don't know the differences between real grow light and street light, the comparison test from Utah State University just between Philips DE and Hortilux SE in my report above.

Hortilux 1000w SE and DE 1960umol/s , compare with Philips DE. the 660nm red light just half. See my report http://www.linkedin.com/pulse/high-par-vs-lumens-hps-lamp-dennis-yang?trk=mp-reader-card Gavita DE made by USHIO, 2100umol/s but 28% blue light rate, Philips standard 30% Most of ther...

Glad to hear it, nano single ended is made by me, they call it SEDE, single ended made with double ended burner, so it can supply 2100 PPF same as double ended. But nano don't purchase DE from us, my price is for real grow light, what they purchased are made with street light burner. For...

real HPS grow light is more than 2.1 umol/s/w, 1.37umol/s/w is the HPS for street lighting.

Let me tell you why such things happen again and again. Above spectrum is 1000w DE on your market, it contain much IR which will cause heat. And this spectrum is real high PAR DE which contain more red but lower IR. That's the truth someone don't willing to tell you.

solis tek is not real 2100μmol/s and contain much IR than Gavita

2150 just a stunt, Philips standard is 2100 30% blue light rate, I even can make it to 2200, but blue light will decreased to 28%, you can download reports from my site www.lumenhort.com Gavita 1000w DE OEM by USHIO, if Gavita said their DE is 2150, how can USHIO only 2100. I can show you...

The reflector of ep is for greenhouse not for indoor grow, the PPFD will be less.

You are right, Gavita fixture is designed for greenhouses, that small reflector is not fit for indoor growing, using big reflector can get higher PPFD.

Interested to know more about their bulbs, what's happended of them?

Hi, everyone, this is dennis000, I have been banned for half year because I told you too much truth, but I still want to tell you more. Maybe you will not see me again soon...... This is the spectrum of Philips 1000w DE This is the spectrum of Genesis 1000w DE, seems contain a little more...