I tell you more info, when I made the first 1000w DE, I quit the job and created lumenhort to start my own business, but I still leading the improvement and test those bulbs in factory laboratory, the
bulb exceeded 2100μmol/s on Nov,2013. They only know I have sold less than 600 bulbs to US market, but they didn't know my father's ballast company has 15 years history in EURO market, EURO greenhouses are using my DE, you may saw the project pics on my website.
The 1000w DE from other companies cannot pass PAR test to entry EURO greenhouse market, but they can go to US market, because customers are not professional enough. Now after I shared my reports, some factories may afraid, some distributors may afraid, someones didn't believe it, but when Utahstate university got the same result as my report, you will know who are telling you the truth.