luminance

A few fluoros cast wan puddles of luminance on the plastic flooring.

Still the whole machine is clear-cut to the smallest wire in their all-exposing luminance.

The remainder of the big room receded into a grey twilight encircling the patch of luminance.

A luminance seemed to come from above, from the unseen heights of the magnificent double staircase.

The silhouette disappeared, and, shortly afterwards, the gray luminance.