Assertion: projector's lumen | /r/CreatedBy | 1000 lux
Facets:
value: for 1 m²
type: OTHER
Source sentences:
text: The value of 1000 lumens, which corresponds to 1000 lux for 1 m², is the minimum necessary, but many devices have at least 1600 lumens, and a number have 2000 or even more than 3000 lumens for the most efficient.