led will pull the same or more with less watts from the wall the problem with them is the cost up front but you soon get that back with the savings on electric
if you only grew outside then forget hydro. yes they grow faster but you need to be on your game and have more equipment to grow. soil would be your best bet since you already have grown outside not to much difference pest control ,lighting and a few other things for lights depend on where you...
no I used one of the holes I think it was one of the 3/4 holes in the electrical metal work boxes cut it out rectangle to fit the computer female plug I hope you understand me what im thinking and what im finger pecking not always the same if you look at some of the new lights and computer...
I used old computer cord with the female end that plug into the computer made a rectangle cut out of metal electric box drilled for the holes and use the same screws and nuts that the computer had wired that end to the drivers along with grounding the frame and everything else then just plug it...
if you live in the states and have the 3 wires in your outlets you are grounded if every thing is hooked up correctly hot,neutral ,and ground but still would not hurt to have surge protecter