Anchor or mooring buoys do not have lights
Anchor or mooring buoys are not required to carry lights. Any sequence would be local.
Mid channel buoys
Regulatory Buoys.
Regulatory buoys can sometimes have white lights. This type of buoy alert operators of vessels of warnings and regulations in the area.
White lights can sometimes be found on mid channel buoys
White lights can sometimes be found on mid channel buoys
Mid Channel bouys
In the US, to my knowledge, the only regular aids to navigation to have white lights are Safe water buoys (Entrance buoys) & range boards. Private aids to navigation may have white lights also. More to follow.
Red buoys have even numbers and red lights; green buoys have odd numbers and green lights.
In the United States, red buoys have red lights, and are even numbered. If the are unlit they are in the shape of a semi-cone and are called "nun" buoys. The day markers are red triangles.
It all depends on who owns the reef and/or who owns the buoys. Generally speaking, you should avoid trespassing.
White lights can sometimes be found on mid channel buoys