Portable Flares and Lights
I am totally stealing this idea from a forum post by Forcedminer I happened across. He suggested that it would be really nice to have flares or portable lanterns that we can set up in caves, camp sites, asteroids, etc. Maybe even a "flare gun" to be able to launch/throw them.
I don't know how these would work from a code standpoint. It seems that a timed existence would be best. I know that some areas are so big my suit lights will not expose it well. If I could throw around some flares (from magnesium powder maybe?) it would be very nice. Alternately a portable lantern block that you can place anywhere would be cool. Just some ideas.