luminous body (e.g. of a shooting star);  bright metal;  sliced fish with the silver skin left on (iwashi, aji, sayori, sanma, kohada, etc.);  20-point card;  bright
 to shed light;  to cast light
 ray of hope;  glimmer of hope
 rise and fall;  ups and downs;  shame and glory;  bright side and dark side; (lit.) light and shadow
 benefiting from the influence of a master or parent
 optical fiber;  optical fibre
 to allow light to pass through;  to shine light through
 optical cable;  optical fibre
 optical disk;  digital optical disk
 optical communications line;  optical network
 photocatalyst;  photocatalysis
 rapid prototyping (machine);  laser etching (machine)
 the light comes from the East;  the light rises from the East;  ex oriente lux
 optical memory card;  optical card
 leaking through of light (e.g. through a curtain);  light leakage
 photodissociation;  photo-dissociation
 Ochromonas vischeri (species of golden alga)
 having a famous parent is the best way to fame
 optical storage media;  optical storage medium
 Optical Transport Network;  OTN
 photolysis;  photodecomposition;  photodissociation
 photonics;  optical engineering