Dverger circlet on an armor stand makes a nice bright directable light.
https://steamcommunity.com/sharedfiles/filedetails/?id=2931047846
You can get soft and diffuse lighting from drakes eggs, poison meads, frost meads, and brighter light from your swamp key (which can be placed on item stands.) You can also make light boxes by making cubes using crystals (dropped by golems and found in frost caves) and filling the cube with thistles.