ya i saw that,ive seen alot of revisions on alot of stuff from rosenthal and jorge,actually hightimes has every once in a while were rosenthal is called on things by growers and changes his first assesment,i know people that disregard most of the information and just grow plants like they allways have and there results speak for them selves, horticulture is a billion dollar industry,and they want to captilize on the money thats out there,my uncle who has been growing for 45 years tells me the only thing benificial to him was learning to seperate the males from the garden,other then that hes been doing the same stuff and has never bought the high priced nutes,he is quite happy spending 5 dollars on some nutes and useing compost.mind you he knew about reflective properties through photogrophy.there is alot of iformation out there and alot of mis information,no one has put in the big bucks to do extensive trials,we all chase the next best thing in growing,like it says in scripture nothing is new under the sun its all been done before.i bet you the incas grew plants with guano 3000 years ago that would make us drool.i can honestly say since i started this hobby for health reasons,ive read about 2000 hours on growing,im trying to keep it simple and just enjoy the fruits of my labour.rosenthall even said in a 2001 ht article that 24 hours was a waste compared to 18/6.he apparently has changesd his views.jorge states in the new bible that a 1000 does very well for a 6x6 room page 177,alot of growers would say from personal experience this is not correct.as well he states that t8,s give off a 100 lumens per watt,ive never seen that,but it may well be true,i thought that the 96 lumens per watt was the highest achieved useing the 54 watt t5 ho,but maybe the t8 is more efficient,but im rambling,so much to learn and so much to disregard.thats why i like this site,seeing what growers are useing,and how they have improved on things,it is an exchange of free information,i try to answer questions if i believe i can help,but if im wrong im uselly corrected by an experienced grower,and thats what its all about..