I would think a candle would be crafted with wax, which you could make with honeycombs and string (the wick) and dye it with regular dyes. and then you could light it with a flint and steel
A block crafted with TNT in the center of the crafting grid then 8 fire charges on the outside. When placed down and ignited, it would spread fire in a small radius around the bomb. It would pretty...