well i was on ebay and saw this light called grolux grow lights. just wanted to know what everyones opinion onthis light was. im trying to decied whether to get the 600watt grolux light or the 400watt hps. the grolux says HPS british 90,000 lumens. if the grolux light stays cooler than the HPS then i think i'll go with that one.. oh yeah they cost about the same give or take $10.00.