600w HPS v.s. 1000w HPS i think 600w hps is better

ok this is what i am trying to figure out. everyone is stuck on the 1000w HPS but the more i look into the 600w HPS it really seems like the better bulb. the 1000W HPS puts off 140,000 lumens and the 600w HPS puts off 90,000 lumens. if you break it down lumens per watt the 600w HPS puts of more lumens per watt. also the 600w HPS is not nearlly as hot as 1000w HPS so it can be placed closer to your crop wich intern means more light your plant can take in. remember the watts per square foot thing is ok but your plant feeds off the lumens not the watts. a 400w hps and a 400w mh will put off the same watts per square foot but not the same lumens. i know alot of people talk about the 1000w can cover a bigger area but i went to my buddies house yesterday who has a 8'x5' aeroponic setup with 50 plants and he use to have a 1000w hps and he got rid of it and got a 600w hps and made a homemade light mover that is nothing more than like a clothes line with a pully on it so he can move the light twice a day and he said he is producing way more bud for his buck with the 600w hps instead of the 1000w hps. just my little thought. would like to hear some input from people and see what everyone else thinks.

they dont get dried out??? or burn???