How many letters does the top answer for “optical device that distributes the light of a lamp evenly” have?

The most common answer is diffuser (8 letters).

Crossword clue: optical device that distributes the light of a lamp evenly

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

diffuser 8 letters wn-def

optical device that distributes the light of a lamp evenly

diffusor 8 letters wn-def

optical device that distributes the light of a lamp evenly