The 30000 ANSI lumens

One lumen makes up 1 ANSI lumen as they both measure the same output of light. ANSI lumens are used exclusively for measuring the output of projectors.

500 ansi lumen

Lumen is a simple way to indicate the amount of light the projector has to produce the brightness of the picture. The higher the number the brighter the picture.

Image brightness from a projector is normally measured in ANSI lumens. Lumens is a brightness measurement and ANSI lumens is a method of standard brightness measurements for projected images. The measurement is based on certain video levels and patterns and helps to compare the outputs from different projectors.

Most manufacturers now quote an ANSI lumen figure although some choose to quote a lumen level that may not be based on the ANSI measurement system. The non ANSI levels will generally be a rather higher figure so they do not offer a comparison with industry standard measurements.

Apparent brightness is also dependent on the ambient light falling on the screen as well as the contrast range of the image itself. For these reasons, don't let the brightness rating influence a choice of model without taking other factors into account.