Lighting systems and connectable lighting devices enable size adjustment to an area illuminated by the lighting system. The connectable lighting system may include a plurality of lighting devices. A lighting device of the plurality of lighting devices may include a body defining a lighting side, a first sidewall positioned on a first side of the lighting side, and a second sidewall positioned on an opposite second side of the lighting side; at least one light emitting component configured to emit light through at least a portion of the lighting side; a first set of metal contacts at least partially embedded within the first sidewall of the body; and a second set of metal contacts at least partially embedded within the second sidewall of the body; and wherein at least one of: the first set of metal contacts are magnets or the second set of metal contacts are magnets.