Collocations for illumination - noun

bright, good, strong
dim
Imaginative stage lighting provided dim illumination.

artificial
the artificial illumination of the studio

natural
The skylights are designed to optimize natural illumination.

level
lights providing a good level of illumination

provide
The skylight will provide good illumination from above.

come from sth
Most of the illumination came from candles.

a source of illumination
The only source of illumination was a single small window.