Abstract: A suction device includes an elastic base and a release structure connected operably to the elastic base. The elastic base has a peripheral portion for to hermetically contacting a contact surface and defining a vacuum chamber therebetween when a predetermined external force is applied on the elastic base, thereby mounting the elastic base on the contact surface. The release structure has a projection protruding outwardly and partially from the elastic base when an applied force on the elastic base is greater than the predetermined external force and retracting inwardly within the elastic base so as to be disposed in the vacuum chamber when the elastic base is mounted on the contact surface such that a distance between a protruding end of the projection and the contact surface is greater than zero.

Abstract: A LED rail projection lamp is mounted slidably on a rail via a rail connector and includes a main body, a power source, a supporting member, a LED light bulb, a plastic member and a rail connector. The LED rail projection lamp. The supporting member has a first end mounted inside the main body, and a second end connected to the rail connector in such way that the supporting member is rotatable in a range of 0-355 degrees relative to the rail connector and in a range of 0-90 degrees relative to the main body. The LED rail projection lamp is simple in structure and neat-looking because all the fasteners are placed inside the main body and are not visible from outside.