It depends which one you use. Voxel models can potentially end up having high poly counts since every voxel face is equal to 2 polygons, however they're great since they be automatically deconstructed cube by cube with the right engine and coding. As for the lighting, it varies depending on what you're trying to achieve but at the base level there shouldn't be any major problems with it.
Here's a great article that explains voxel art in greater detail:
Awesome, yeah voxel are a great artistic medium; they can be massively useful for rapid prototyping and are highly stylistic.
Yeah I've worked on a few games. I was an artist on Critical Annihilation (Steam), created Lonely Forest (mobile) and am currently working on Lil' Chomp. I also made an isometric asset pack with 1000+ sprites.
http://store.steampowered.com/app/339440
https://cartrdge.com/vague/lil-chomp-concept
Fantastic yes I'd definitely be interested in teaming up with you. I have a fun and achievable theme/gameplay idea that I'd like to work with for it (I'm open to suggestions though); I'll DM you this information on Twitter, my twitter handle is @Cynical_Poet
Here are two concepts I've come up with:
https://docs.google.com/document/d/1umWMzsjgQM8QXXa4Dh33_Bokvjieb53f-lD6U5NmyxY/edit?usp=sharing
Would you be interested in working on one of them with me?
