valgustatus tähendus null.

illumination [illuminations]▼◼◼◼noun
[UK: ɪ.ˌluː.mɪ.ˈneɪʃ.n̩] [US: ˌɪ.ˌluː.mə.ˈneɪʃ.n̩]

illuminance▼◼◼◼noun