EFFICIENT ILLUMINATION SYSTEM FOR LEGACY STREET LIGHTING SYSTEMS

摘要

An LED lamp for outdoor and large space lighting, particularly for streets, warehouses car parks and the like, is adapted for fitting into legacy light fittings designed for sodium bulbs and the like. The LED lamp includes light emitting diodes arranged over a surface of the lamp, is rotatably connected through a rotatable electrical connection to a screw-in adaptor for insertion into a legacy screw-in socket, such that the screw in adaptor is rotatable independently of the lamp, so that the legacy screw in socket can be used even though the light fitting is too small to allow rotation of the LED lamp. Additional variants provide for cooling airflow through the light fitting, for temperature control of the LEDs, and for failure protection, to ensure a longest possible lamp lifetime.

主权项

1. A lighting device comprising an LED lamp for fitting into a light fitting having a screw-in socket, useful for outdoor or large space lighting, the LED lamp comprising a plurality of light emitting diodes arranged over a surface of the lamp, the lamp comprising a rotatable electrical connection and a screw in adaptor, the lamp being rotatably connected through said rotatable electrical connection and said screw-in adaptor by insertion into the screw-in socket, such that the screw in adaptor is rotatable independently of the lamp, the independent rotation of the screw-in adaptor thereby making an electrical connection through said socket even if the light fitting is insufficiently sized to allow rotation therein of the LED lamp. wherein said rotatable connection to said screw in adaptor comprises an inner and outer concentric ring on a first side of said connection, the concentric rings having a gap therebetween, and a third concentric ring on a second side of said connection, said third concentric ring being slidable into said gap to be snapped into position between said first and second concentric rings.