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lights 
Fixed or portable devices designed and used to diffuse electric light.
adjustable lamp
Multidirectional light usually mounted on a worktable by an adjustable clamp.
adjustable clamp
Mechanism in the form of a vise for mounting the lamp to the edge of the worktable.
spring
Elastic metal coil for changing and maintaining the position for the two sections of the arm.
shade
Opaque shield directing the lamp’s light onto the work surface.
arm
Articulated moving bar for adjusting the position of the lamp shade.
on-off switch
Button for turning the device on or off.
