Meanings

blackout curtain

tourist map

artificial light

ray of hope

bioluminescence

luminescent organism

near-light speed

fluorescent whitening agent

nonlinear optics

crepuscular rays

pleinairism

flash signal (e.g. between ships)

tourist hotel

halo effect

halo effect

doing or receiving something good by accident or through the invitation of someone else

the light comes from the East

traces of a moving light

travel guide (book)

long exposure (photography)