Hell mr big..
yes, all the info is on the web.. and all the info is in your local library and actually all the info is in your DNA.... bt some people enjoy books and DVDs.... I do most of my reading in hard print...I prefer a hard copy read over computers... and it is a small investment when growing something where the risk is so high and the outcome can be so great..
The grow DVDs can inspire, teach and spawn fresh ideas.... I watch shot loads of fitness clips on youtube and crossfit.com ... I am not fat ... oh contrair
yes 2 - 600 watt bulbs can be better than a single 1000 watt blb.. but a single air cooled 1000 watt hps in the finest piece of growing equipment any grower could have.. it allows the grower to put the light 4-12 inches above his plants GETTING amazing lumen absorption, photosynthesis, unbeatable canopy penetration, and the finest densest buds...
If you watched 15lbs in 80 days.. you would see that the primary lights used in that operation are 600 watt hps bulbs.. the entire grow takes place in a 10x10 room.. (not including the closet)...
For a lot of people, especially in California... they don't want to go over the legal number of plants.. so they stick to using 1000 watt bulbs .. which are great, not only for all the reasons i mentioned.. but because they (the growers) only have a few plants...