The antonyms for the phrase "more ill lighted" can be described as bright, luminous, radiant, dazzling, or illuminated. These words represent the opposite of the darkness and dimness associated with the phrase "ill lighted." Brightness and clarity denote a level of sharpness and precision, whereas a lack of light brings an element of uncertainty, confusion, and even danger. A well-lit area provides a sense of safety and comfort, while a poorly lit area can cause anxiety and unease. Therefore, using antonyms like "bright" and "dazzling" would imply a sense of positivity and encourage a better, happier environment.