https://www.rollitup.org/indoor-growing/106339-150w-hps-club-inspirational-resource.html
I feel that your light/lights determine where you will grow and efficiency would be greater dictated by the type of grow you choose. Popular consensus says that a SOG or SCROG is best suited for 150's and 250's but do whatever compels you.
A lot of people say that noobs are lucky to hit 1 gram per 5 watts and each successive grow
should get better and then the sensi masters are expecting 2 to 2+ grams per watt. I ignore what "a lot of people" say and grow indoors for the fun without numerical expectations of yield. Its all about chalking up experience and toking up afterwords.
Check out
Someguys journal if efficiency is on your mind, I think a similar design would work great with a 150.
Here is a pic from his journal to peak your interest. Hope this helps.