| 摘要 |
PURPOSE:To obtain a lighting device wherein the heating degree of the entire surface is uniform and which can be used in extremely cold places by winding a piece of heating wire around the glass tube of a fluorescence lamp at a required pitch. CONSTITUTION:A piece of heating wire 21 is returned at the central part and wound around the glass tube of a fluorescence lamp of a lighting device for instruments in a spiral pattern at a pitch which is smaller than the diameter. The heating degree of the entire surface of the lamp 20 is uniform. Therefore, the lighting device for the instruments of a vehicle which can be used quickly and excellently even in an extremely cold place, e.g. at 30 deg.C below zero and the like, is obtained. |
