John, To answer your question I contacted Bob Trapani and his response follows:
The new Carmanah LEDs can be retrofitted to existing buoys and lights such as pier, jetty and stand-alone towers. The beacons are attached by four bolts -- similar to how the current 155mm incandescent lanterns are affixed to buoys and towers. The Carmanah is AtoN made simple, reliable, safer for servicing personnel and very cost effective. With a Carmanah LED, there is no more troubleshooting a lighted aid when it is extinguished to ascertain whether the lamps, lampchanger, flasher, daylight control, solar panels, cables or batteries are the problem that caused the discrepancy. The Carmanah is a superb AtoN advancement for the Coast Guard in places where these lights can be utilized.
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