Originally Posted by MYTraveler
Most of my trips involve night travel, but usually offshore, rarely within a harbor. Offshore, even with no moonlight, I have never found it too dark to see surface obstructions so long as my night vision is not impaired. But to maintain good night vision, it is necessary to protect your eyes from stray light. Using any kind of searchlight / spotlight will impair not only your night vision, but also that of other nearby boaters.
I am surprised the spot light manufactures dont provide a red lens add on or even a switch selectable red/white bulb.