What is the difference between a waterproof and a submersible light?
Submersible lights use the bell-jar concept. This allows a small amount of water inside the housing. The resulting air pressure inside the cavity prevents any additional water from reaching the area where the contacts and sockets are located. Waterproof is usually associated with a completely sealed light. Some companies claim their light is waterproof, but in actuality, their light also uses the bell-jar concept.
