How nany ANSI lumens equals 1000 lumens?

1000 lumens = 1000 ANSI lumens

lumen is the measurement of how bright a specific point is, so in reference to the brightness of a projector, this will refer to the brightest part of the projected image. ANSI lumens is the...

Bright

The lumen (symbol: lm), the SI unit of luminous flux, a measure of the perceived power of light

It depends on the efficacy (not 'efficiency'!) of the lamp, as it varies considerable according to whether the lamp is incandescent, fluorescent, etc.