| 摘要 |
PURPOSE:To provide a safety lamp, for displaying a dangerous zone of a construction work site or the like in the nighttime, which can be automatically lighted by simplifying a constitution at a low cost. CONSTITUTION:Electric lamp bulbs 9.9... are parallelly connected with a prescribed space apart to a power feed cable 11, and the electric lamp bulb in the nearest to a power supply side serves as a control electric lamp bulb 7. A substrate 19, mounting a photosensor 21, lighting circuit 22 and a light emitting diode 14, is provided in this control electric lamp bulb 7, to cover a total unit of this substrate 19 with a light diffusion synthetic resin 20. |
