It is lit for every Mass during Easter Season and for a funeral Mass as well as for Baptisms.
You may be referring to the red candle at the tabernacle, where Jesus presence in the form of bread is kept. When lit, it tells all that Jesus is present. When not lit, as on Good Friday, Jesus is not there.
The white candle that is sometimes used in an Advent Wreath is the Christmas or Christ candle and it lit at the Masses starting with Christmas midnight Mass. Most Catholic Churches use only the 4 violet and rose candles during Advent and the wreath is removed from the church when Christmas decorations are put up on Christmas Eve.
The melted wax from a lit candle is typically referred to as "candle drippings."
If you mean lit as in "He lit the candle", then the preset tense for lit is Light. "I am lighting the candle."
A paschal candle is lit
The candle traditionally lit on the second Sunday of Advent is the Bethlehem candle.
the sanctuary lamp is a light or lit candle that shines red; it indicates the presence of Jesus in the tabernacle
Both "The candle is lighted" and "The candle is lit" are correct ways to convey that the candle is currently giving off light. "Lit" is more commonly used in spoken English.
This is lit.
Paschal candle.
If you are referring to the Sanctuary Lamp, it is extinguished after the Mass of the Lord's Supper on Holy Thursday and not lit again until the Vigil Mass on Holy Saturday. This is done in all Catholic churches around the world. So, the candle does not burn on Good Friday and most of Holy Saturday.
the paschal candle