Lightime / illumination

The illumination's meaning shine when it emit light.
But how can give meaning not just turn on the illumination but also turn off it?
'Lightime' is a led illumination consist of led modules.
We can use timelight to a illumination and when turn it off,led module show the time.
Illumination just meaningless thing when turn it off.
so I designed the another possibility of the illumination.