Um, we need to know more...do you mean growing inside your house? Inside your cham's cage? Inside a terrarium for another type of herp?
If you are not housing a day-active lizard you can use a fluorescent "grow light" commonly available at hardware stores or nurseries. If you are housing a day active lizard you'll need a UV spectrum fluorescent light such as the ReptiSun 5.0, the Acadia, or ReptiGlo, not just a grow light.
Please let us know what you mean, OK?