A lighting apparatus of the present invention includes: a light source; a power source unit arranged to power the light source; a detector unit arranged to detect the deterioration of ability of the power source unit to power the light source; and a determination unit arranged to determine the life of the power source unit in response to the detector unit. The middle portion is essentially a water tank which provides water to be used in humidification. The user account as defined by the control assembly, includes a defined value, the authorization code provided being utilized to facilitate a transaction in accordance with that defined value. The upper and lower surfaces are disposed in a converging angular relationship to each other such that the implants have an overall \u201cwedged-shape\u201d in an elevational side view. The axis of slanting movement of a movable swash plate of the hydraulic pump extends laterally of the vehicle body on which the axle driving apparatus is provided.