The lower the wattage your grow lights are the harder it is to yeild one gram per watt,this is why so many new growers & low wattage growers find it impossible to believe its an easily obtainable goal,the more wattage the easier it is,just going from my own yeilds i can see an accomplished indoor grower like Albfuct or Filthyfletch reaching 1.5 grams per watt fairly easily,not that their super human growers or anything but their gardens have been in operation for long periods,all the bugs are worked out,they know the strain very well & their rooms are on auto pilot.
Currently Im getting damm close to a gram a watt & im a lazy ass grower,my bud room is on auto pilot because it has to be,i only visit the grow op every 2 days & if something needs done with the plants before i visit again tough titties there on their own,i simply cant visit every day.
Im positive i could get a gram a watt if i cared enough to pay better attention to my garden but because of distance i cant give it any more attention,my wife has been promised a med mj card by her pain managment doctor once my state puts the finishing touches on our new law,once that happens the garden is comming home & i'll get a gram a watt or better easily,of that im sure.
Its not that hard guys,think it through & you'll see.