LED's give a full spectrum that is why Plants do very well in VEG when under LED's... BUT when it comes to flowering LED's do not pack a punch against HPS... I used Mars II 1600 watt to flower two plants and i used 2 600 Watt HPS to flower two other plants. In two different tents but same...
You are better off buying cheap CFL lights if you want grams to smoke homes..... traffic lights don't have enough lumens or the right spectrum yo! waste of time yo....get cheap cfls and hook them up
Don't listen to all the hype on and bullshit you read from high times....All you need is normal garden soil that you can buy from any garden centre, for nutrients just buy General hydroponics flora....micro...bloom...grow.....you can also get yourself some calmag if needed but you don't really...