Inspirational 50+ Jamb Switch Closet. With this type of switch, it will not be necessary to switch the closet light on or off manually. X closet doors x repair as needed door jamb casing etc. I'm surprised more houses don't have these. Amazon's choice for closet door jamb switch. Jamb Switch Closet - An Easy To Add Cabinet Door Activated Light Switch Woodworkeraccess Door jamb switch al por mayor online: Flat jambs with adjustable stop.