yields all based on how much energy they get and having best conditions so it depends. how many watts(actual watts) and lumens altogether and how big is the space, you want to have atleast 3000 lumens per foot squared for veg and 5000 for flower(though this is for photoperiods but im guessing its across the board).
find the square footage of your area by multiplying width by length and then divide that by the total lumens you will be using.
also keeping environmental conditions optimal will help with yield in the end, temps should be kept within 70-85ish at most( i think) and no less than 60 at nights or it will slow growth, good ventilation is important too and will be a big deal in a small area with lots of lights to keep temps down.
humidity should be around 40-50(i think?) too high humidity in flower can cause moldy buds.
im not sure on nutes but without over or underfeeding im sure you will do well, im using GH flora series myself and so far other than unrelated problems plants are doing well. no nute burn at recommended doses but each plant will be different and you have to dial it in. someone whos grown some jems might be more help in that regard.
bubbleing water before making up feed is supposed to be good to remove some chlorine and add some oxegen that the roots can use, supposed to help growth. you can buy a crappy air pump and air stone from a pet/fish shop pretty cheaply.
you need nutes through both unless organicly grown or pre nuted soil(which can be a big problem) you should use veg nutes from around 2 or 3 weeks in depending on progress, light does at first working up to strength untill vertical growth stops or slows. many peop[le will say autos only need flower nutes cause they show pistils/sex so early but this is a common misconception. they veg long after this. then swicth to bloom or some people mix near the switch so maybe half veg and half bloom doses for a week im not sure.
keeping in optimal ph range for your medium to prevent lockouts deficiencies and damage are all important too. you should get a digital ph pen(decent one) if you can.
these are all just rules to go by for optimal results but you will be able to grow something with worse conditions but it will not be as good in the end product quality and weight wise.
keep in mind temps will be higher when the area is full of plants pots fans etc so this should be taken into account.
someone correct me if wrong just typed from memory.
ill go rest my fingers.....