The anwser is going to be 6
If bloom works for 7.5 hrs a day and makes 15.76 an hour that would be 118.20 a day, 591 a week, 2,364 a month, and 28, 368 a year.
The weight of the candles is 3/5 greater than of the watermelon, or 60\%, or 0.6.
I’m pretty sure it’s 10 and 16