I've gathered links and videos I find helpful if you want to dive deeper in to this topic

www.benq.com/enus/knowledgecenter/knowledge/ansilightsourceandledlumenshowledprojectorswith3000lumensareamarketingploy.html

https://www.viewsonic.com/tr/products...

https://eu.xgimi.com/blogs/projectors...

Benq's video I've used some of it
   • Understanding 4LED  Part 1: What is ...  

Elite Screens Video
   • ✅ Elite Screen ✯ Understanding ANSI L...  

https://www.wemax.com/blogs/tutorials...

https://www.projecticodis.com/blogs/p...

http://www.differencebetween.net/tech...