A wall-mountable electrical load control structure for controlling the power to be applied to an electrical load, said load control structure comprising: a support frame having a front surface and a rear surface, the front surface defining an elongated rectangular opening therein, the rectangular opening having a length which is greater than its width; an enclosure secured to and extending from the rear surface of said support frame; a generally-flat cover plate secured relative to the front surface of said support frame, said cover plate defining a plane and having a centrally disposed rectangular opening; an elongated rectangular pushbutton slidably received with respect to said elongated opening of said support frame and passing through said rectangular opening in said cover plate, said pushbutton moveable perpendicularly to the plane of said cover plate; a switch mechanism supported in said enclosure and coupled to said elongated pushbutton, such that said pushbutton is operable to cause said switch mechanism to turn the power to said electrical load on and off in response to the operation of said pushbutton; a source of illumination supported behind said support frame and being electrically energized when the power to said electrical load is turned off, said pushbutton having two translucent surface portions (151,157) which are positioned to be illuminated by said source of illumination when said source of illumination energized, a variable-intensity control circuit (130,132,136) coupleable to said electrical load; and a slider control for varying said intensity control circuit (130,132,136) to control the amount of power delivered to said electrical load, said support frame having a vertical slot extending parallel to its said elongated opening and laterally spaced therefrom, said slider control comprising a shaft that extends perpendicularly through said slot and having an operating knob at its outer end and connected to said variable-intensity control circuit (130,132,136) at its other end, characterised in that said slot is adapted to be illuminated by said source of illumination when said source of illumination is energized. a support frame having a front surface and a rear surface, the front surface defining an elongated rectangular opening therein, the rectangular opening having a length which is greater than its width; an enclosure secured to and extending from the rear surface of said support frame; a generally-flat cover plate secured relative to the front surface of said support frame, said cover plate defining a plane and having a centrally disposed rectangular opening; an elongated rectangular pushbutton slidably received with respect to said elongated opening of said support frame and passing through said rectangular opening in said cover plate, said pushbutton moveable perpendicularly to the plane of said cover plate; a switch mechanism supported in said enclosure and coupled to said elongated pushbutton, such that said pushbutton is operable to cause said switch mechanism to turn the power to said electrical load on and off in response to the operation of said pushbutton; a source of illumination supported behind said support frame and being electrically energized when the power to said electrical load is turned off, said pushbutton having two translucent surface portions (151,157) which are positioned to be illuminated by said source of illumination when said source of illumination energized, a variable-intensity control circuit (130,132,136) coupleable to said electrical load; and a slider control for varying said intensity control circuit (130,132,136) to control the amount of power delivered to said electrical load, said support frame having a vertical slot extending parallel to its said elongated opening and laterally spaced therefrom, said slider control comprising a shaft that extends perpendicularly through said slot and having an operating knob at its outer end and connected to said variable-intensity control circuit (130,132,136) at its other end, characterised in that said slot is adapted to be illuminated by said source of illumination when said source of illumination is energized.