Since this light does have three different colors will I need to switch the red and green lights off when I am at anchor? If so then would that mean that the light isnt wired up the same way as a normal light? Becuase I would think I would have to have some specail way to switch them off. Or, can I just leave the red and green on when I am at anchor?
If you get a tri-color light, you should get the version which also incorporates an anchor light above the tricolor running light. If you only get the tri-color running light arrangement, you will turn all three lights (red-port, green-starboard, white-stern) on and off with one switch.
You cannot legally re-wire it to have it double as an anchor light, since the stern white light cannot be seen from 360 degrees.