How many ANSI lumens do I need for a portable projector?

Reviewers across r/projectors and TechGearLab generally agree that anything under ~200 ANSI lumens will look washed out unless the room is fully dark. For backyard or partially lit rooms, expert consensus points to 500+ ANSI lumens; for true outdoor brightness with ambient light, look for 1,500 ANSI or higher. Manufacturer 'lumens' claims (often 7,000+) are widely flagged as marketing inflation.