An illumination device comprising: a housing (710; 910; 1110; 1310) comprising an opening; an adjustable mount (210;) attached to the housing; and a luminaire module (200; 930; 1330) coupled to the housing via the adjustable mount, the luminaire module comprising: a plurality of light-emitting elements (LEEs) adapted to emit light; characterized by: a light guide (230; 1040) positioned to receive light from the LEEs at and input end and adapted to guide the received light to an output end of the light guide, wherein the light guide has a uniform thickness which is the distance separating two planar opposing side surfaces of the light guide; an optical extractor coupled to the output end of the light guide and adapted to receive light from the light guide, the optical extractor having at least one redirecting surface, the at least one redirecting surface (243; 243b-243g) being adapted to reflect at least a portion of the light received at the optical extractor the optical extractor comprises one or more output surfaces, and wherein the optical extractor directs light from the light guide towards the one or more output surfaces of the optical extractor, wherein the LEEs and at least a portion of the light guide are recessed within the housing and the adjustable mount allows variable positioning of the luminaire module relative to the opening. a housing (710; 910; 1110; 1310) comprising an opening; an adjustable mount (210;) attached to the housing; and a luminaire module (200; 930; 1330) coupled to the housing via the adjustable mount, the luminaire module comprising: a plurality of light-emitting elements (LEEs) adapted to emit light; characterized by: a light guide (230; 1040) positioned to receive light from the LEEs at and input end and adapted to guide the received light to an output end of the light guide, wherein the light guide has a uniform thickness which is the distance separating two planar opposing side surfaces of the light guide; an optical extractor coupled to the output end of the light guide and adapted to receive light from the light guide, the optical extractor having at least one redirecting surface, the at least one redirecting surface (243; 243b-243g) being adapted to reflect at least a portion of the light received at the optical extractor the optical extractor comprises one or more output surfaces, and wherein the optical extractor directs light from the light guide towards the one or more output surfaces of the optical extractor, wherein the LEEs and at least a portion of the light guide are recessed within the housing and the adjustable mount allows variable positioning of the luminaire module relative to the opening. a plurality of light-emitting elements (LEEs) adapted to emit light; characterized by: a light guide (230; 1040) positioned to receive light from the LEEs at and input end and adapted to guide the received light to an output end of the light guide, wherein the light guide has a uniform thickness which is the distance separating two planar opposing side surfaces of the light guide; an optical extractor coupled to the output end of the light guide and adapted to receive light from the light guide, the optical extractor having at least one redirecting surface, the at least one redirecting surface (243; 243b-243g) being adapted to reflect at least a portion of the light received at the optical extractor the optical extractor comprises one or more output surfaces, and wherein the optical extractor directs light from the light guide towards the one or more output surfaces of the optical extractor, wherein the LEEs and at least a portion of the light guide are recessed within the housing and the adjustable mount allows variable positioning of the luminaire module relative to the opening. a light guide (230; 1040) positioned to receive light from the LEEs at and input end and adapted to guide the received light to an output end of the light guide, wherein the light guide has a uniform thickness which is the distance separating two planar opposing side surfaces of the light guide; an optical extractor coupled to the output end of the light guide and adapted to receive light from the light guide, the optical extractor having at least one redirecting surface, the at least one redirecting surface (243; 243b-243g) being adapted to reflect at least a portion of the light received at the optical extractor the optical extractor comprises one or more output surfaces, and wherein the optical extractor directs light from the light guide towards the one or more output surfaces of the optical extractor, wherein the LEEs and at least a portion of the light guide are recessed within the housing and the adjustable mount allows variable positioning of the luminaire module relative to the opening.