Hi Luanne.
At first I thought "another advent wreath project!"
But then I saw your photos and the tea-lights that really light up. Nice touch!
To tie this Advent wreath lesson to Isaiah, I would suggest writing the "names" ("Emmanuel, God with us" etc.) or verse excepts ON the candles. Each candle could represent what Jesus was going to be/do.
The words and verses could be printed on the colored paper before it is glued to the tubes. (Or preprint verses for younger students.)