Solution

158540

First name
Ayati
School
Cippenham Primary School
Country
Age
8

I worked out that 66 candles would be needed up to and including Ben's eleventh birthday. I tallied up the number of candles needed for each birthday and added them together. If the candles lasted for longer than a year then up to and including Ben's eleventh birthday only 11 candles would be used so far.