Sounds like a lot of people have this problem including me, there's several issues about this flickering on this forum, it seems it does eventually sort itself out, mine went after about 30 hours if that helps.i own an ax100u and it says 2000 for normal and 3000 for eco-mode. however, my project experiences flashes in brightness levels when in eco-mode. you can tell that the brightness level changes every other second and it's really annoying. i don't know if it's just happens when connected to VGA or if its a problem in the lamp power circuitry boy it's really annoying. it's especially noticable esp right now when i'm looking at this white page.