Hello theravada_guy, all,
Within the rituals of Theravada, lights, incense and flowers have very special significance.
The lighting of a candle symbolises the teaching (Dhamma) which lights up the darkness of ignorance.
The incense symbolises the good conduct which permeates the atmosphere with pleasantness.
The flowers remind us of impermanence. What is beautiful today, fades with time and eventually becomes ugly.
---The trouble is that you think you have time---
---It's not what happens to you in life that is important ~ it's what you do with it ---