In each region, a unit of the back light turns on or off.

What's the difference between a blacklight and a blacklight-blue bulb?

Neither the coolness of the air nor the darkness of the night

At the top of the list of best black light party supplies is always the black light itself.

The rest being composed of “dark matter” (24,6%, see the recent map) and “dark energy” (about 75% and unknowable)…

Here the light is that of the Last Judgement, a black light, and Iago is the herald of Apocalypse.

In 1896 he reported observing a new kind of radiation, which he termed "black light" (not the same as what modern people call bla...

In 1896, he reported observing a new kind of radiation, which he termed "black light" (not the same thing as a black light today), although it was later discovered not to exist.

During 1896 he reported observing a new kind of radiation, which he termed “black light” (not the same as what modern people call black light today), though it was later discovered not to exist

There is what we call white light, red light, black light and clear light.

In 1896 he reported observing a new kind of radiation, which he termed "black light" (not the same as what modern people call bla...

In 1896, he reported observing a new kind of radiation, which he termed "black light" (not the same thing as a black light today), although it was later discovered not to exist.

The backlight system and transflector cooperate to provide circularly polarized light with high brightness and efficiency.

That serpent is the dark fire, that dark light from which the light emerges.

Also the follow up "Afterlight" by the same author.