Focus on both, as i interpereted what it says in the meditation and feel; i imagine my Chakras as with every bit of my body shining with bright powerful light that spreads past my skin to create a clean and healthy aura that envelopes my entire being. Hope that helps Love, i actually replied to a couple of your posts before. Nice to see you again friend ^-^ *hugs and kisses*
You focus on the Aura around you. You can also clean your Soul, as well, inside.
Technically, the Soul consists of various things. When we say Soul, as in meaning inside or internal, we tend to mean the Light Body. The Light Body and the Aura, and other things, are all the Soul.
It's difficult to imagine the sun when it's snowing outside, but very effective when cleaning your aura/ chakras.
I imagine the sun in front of me and receiving it's life giving rays. I then I step into it, soaking it up and emotionly (very important) receiving it's energy.