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LED train headlights.

Discussion in 'Lighting' started by Clive Mitchell, Jul 29, 2004.

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  1. I was waiting for a train in Glasgow Central Station (Scotland) today,
    and had a good look at the LED side lights and headlights on one of the
    Virgin trains. The side lights are quite smart. It's basically a
    square PCB with standard 5mm amber LEDs mounted on it in three
    positions. The middle cluster for creating a round shape when viewed
    from the side, but also two vertical strips of 12 LEDs at either end
    that were reflected out sideways by angled reflectors on the cover. It
    was a clever approach, since it meant that all the LEDs could be mounted
    with their bases against the PCB.

    The front and rear LED lights were particularly impressive. Anyone
    who's noticed them will probably have assumed they are a grid of Luxeon
    emitters, but again they are standard 5mm LEDs mounted on a PCB with the
    front lens assembly containing a series of moulded lenses to direct the
    output from each LED forward in a narrow angle.

    These aren't the main headlights, they are front and rear markers with a
    set of red and white fro each end of the train. When you see them lit
    they certainly look bright enough!
     
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