It is good to always focus on the light within, and the way to do this is to make it a regular practice – to go within, feel what you are feeling, and consciously ask for it to be transformed in the light. This is enough to be able to sustain you and keep you going forwards in the light of oneness.
And if you would like to have more light in your body, then you are able to engage in practices that help you create and embody more light, such as being in the light of oneness through meditation, or perhaps even using your voice to create light and then letting it be embodied in you. That is all.