Having adequate illumination refers to having enough light to effectively see and navigate a space. Synonyms for this term include well-lit, brightly lit, adequately lit, and sufficiently illuminated. Other phrases that can be used to describe this condition include having ample lighting, being properly illuminated, or having appropriate brightness. Illumination can greatly improve the functionality and safety of a space, and so it is important to choose appropriate lighting fixtures and bulbs that provide sufficient illumination for the specific area. Proper lighting can not only make a space more visually appealing, but can also promote productivity and enhance the overall experience of those using the space.