Must inherent light come from artificial sources?

• A. Yes
• B. No
• C. Sometimes
• D. Always

Answer: (B)

Light can originate from natural sources or from objects that emit light themselves. Inherent light doesn’t require ongoing artificial input. Daylight is a prime example—light entering a space from the sun is inherent to the environment and doesn’t rely on electrical fixtures. There are also materials that glow on their own, such as phosphorescent or luminescent substances, which can provide light without continuous artificial energy. Because light can come from natural sources or intrinsic emission, it isn’t required to come from artificial sources. In practice, you balance daylight with artificial lighting, but inherent light itself does not have to be artificial.