Tiong projector only got a few legit brands like xgimi, jmgo, Xiaomi.
Buy projector is got a lot of specs need to look into like lumens, contrast ratio, dynamic ratio, native resolution, keystone, colour reproduction, autofocus, throw distance, fringing and chromatic aberration of lens etc.
Any projector not from the major brands I mentioned above are likely OEM crap and Lumos falls under the crap category no matter how they claim to be different from the rest.
A good amdk/jipun brand like Epson, canon, viewsonic etc. even at lower native resolution can outshine OEM tiong crap advertising as 1080p native (which is most likely upscaled reso and falsely marketed as native). That's why they cost thousands and used in professional settings.