A projector with 1500 lumens

[reminder]

I want to use the projector in a room with natural light coming in.

Do you think a projector with 1500 lumens is good enough?

Thanks

[lynx]

It depends on the size of the image you want to display.

This page may give you some guidelines.
http://www.cpilive.net/news_ver2_old/guides_2004/projector_guide_issue_04/office.htm