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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Light alternative:

TUNGSTENLAMP: LED light alternative
STOPSIGN: Light alternative
STOPSIGN: Traffic-light alternative
FOURWAYSTOPSIGN: Light alternative
FANTASYCONGRESS: Another entertainment alternative in light of the 17-Across
LOLCATS: Another entertainment alternative in light of the 17-Across