Lighting device, lighting system, and method for controlling lighting device

A method for controlling a lighting device,

• the lighting device including:
• a light source that includes a plurality of light emitting elements arranged in a two-dimensional array;
• a driving circuit that drives the light source;
• and
• a projection lens that projects light emitted from the light source driven by the driving circuit as illumination light,
• the method comprising:
• acquiring a control command by communicating with a control device;
• and
• causing the driving circuit to drive the light source based on the control command acquired,
• wherein the control command includes pair information that includes:
• a tag that indicates a parameter of the illumination light;
• and a specific value of the parameter indicated by the tag, and
• the parameter is any one of a shape, a position, a size, a color, or a brightness of a lighting region to be illuminated by the illumination light, or a time-varying factor related to at least one of the shape, the position, the size, the color, or the brightness of the lighting region to be illuminated by the illumination light.