Its mainly the strain, and the growing location.
Using UV can be quite dangerous as high levels of UV cook the skin.
Your best bet is to get a strain , get it stablized , and get it growing good.
I figure it takes about a year to figure out a stain.
I'll take 10 seeds get 10 plants, 5+ males
Take clones from each plant , test each product from each seed, get the best.
Then comes the grow / bloom once you figured out what seed made the grade
Now you prefect the growing and blooming sequence.
You want the most product for the watt. The GWM is the bottom line
1000 grams from a 1000 watt bulb in 2 months that give you a .5 grams per watt.
DRY, Cured, clean, trimmed bud on the scales.
If you doing it as a fun thing , have fun. If your doing it as a hobby , thats where the game is.