The seven candles represent the completion and perfection of God’s creation. It is said in Genesis that God created the world in 6 days and rested on the 7th. 

7 is the number of completion, and also represents the Seven spirits, as in the seven churches. 7 is a powerful number that God uses to create and finish His promises. In this painting, the seven candles are here to symbolize a completion and perfection of God's promise over your Life.

Revelation 1:20
 "The seven stars are the angels of the seven churches, and the seven lampstands are the seven churches."