Our sign
at night on the Tullamarine Freeway Melbourne.  The LED-DOT becomes
illuminated with its own internal high intensity amber LED's from
Hewlett Packard for unsurpassed legibility Each flip disc is illuminated with two light emitting diodes incorporating directional optics. These are clearly visible at a distance in excess of 270 metres. In addition the very low current drain complements the solar energy system.
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