Anchor light wattage?

Depends on where you tend to drop anchor, with almost every other boat in my area (The Wash/North Sea) being commercial, I'd much rather be seen while I'm tucked away in bed....... Not much chance of me spoiling anyone's night vision, but point taken.
 
No, there's plenty of overlap of individual LEDs. We have driven the tender around the boat at anchor several times to check effectiveness of the anchor light and it's excellent from all positions.

Over the years I have owned and made a number of anchor lights and this one is by far the best, as well as consuming a fraction of the power of all the others.
 
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