QUARANTINE!!! Put it (and your light) in the bathroom for a week. During that time, bug bomb the room twice, 3-4 days apart.

For a plant that large, you wANT 2 points of light to get the sides too. You're looking at a pair of HPS 400 minimum.

iF THE PLANt is in the soil, you will likely kill it trying to dig it up, or at least stress it into a herm. If it's in a pot, you're safer.