A flashlight kit including a flashlight including a body including a light and a battery disposed in the body, which is electrically connectable to the light with a switch, and an attachment device for attaching the body to an attachment surface, the attachment device including a spike for jabbing the attachment surface. At least one of the optical elements is adjusted such that for each of the parameters in the set, the field maximum of its absolute value is minimized. The compositions may also include surfactants, emulsifiers, oxidants, and other components. The test controller further includes dedicated control circuitry including a plurality of logic gates and a first logic gate. By means of the switching mechanism, the mouse device is operated in a clicking-feel-imparting mode or a clicking-feel-lacking mode.