What types of plants grow better in artificial light a nasturtium or a sunflower?

Both of these flowers require full sunlight to bloom, something which artificial lighting just cannot duplicate without considerable expense (a high-intensity UV growing setup might do the trick). That's not to mention the space required: sunflowers can grow up to 12 feet in height, and even dwarf nasturtium will spread to 30". Unless you are blessed with a commercial greenhouse or a two-story, south-facing atrium, attempting to grow these beauties indoors will only disappoint.