White lights are found on usually indicate mid-channels or fairways. These buoys will usually have red and white vertical stripes.
Danger
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
White lights can sometimes be found on mid channel buoys
They are normally white buoys with a horizontal blue stripe.
Mid Channel bouys
Mooring buoys are white with a blue horizontal band.
A white buoy with an orange marking most likely indicates that you should proceed through the area with caution. The buoy often marks rapids, rocks, or sandbars.
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.