and as stated, you will need to supply heat as well as light in order for your plumeria (a tropical tree, after all!) to bloom. As already mentioned your plumeria - since it is seed-grown - will not be 'Bella Vista' but a new variety. If it is nice you could name it yourself and even register it if you wish!
However - a seedling can take a number of years (3 years and up) to bloom and you may get impatient. I would definitely recommend that you get an established plant grown from a cutting from a reputable seller so you will see blooms sooner.