Boat light, especially for transom mounting

DETAILED DESCRIPTION The invention may be briefly summarized as a boat light especially well adapted for surface mounting on a transom (though some circumstances be utilized in a mounting of the recessed type).
To this end, the invention comprises a generally cylindrical housing, having an inner end adapted to be closed by a protective shield.
The housing is adapted to be secured to the transom of the boat hull.
Within the outer end of the housing, there is mounted a lamp unit holder, of the so-called "eyeball" type, having a spherically curved outer surface complementing a correspondingly curved inner surface formed in the outer end portion of the housing.
A lamp unit is releasably gripped within the holder to facilitate ready interchange of said units, which are per se conventional.
The holder, at its inner end, has a shallowly conical end wall, the apex of which is rounded off.
The rounded area of the end wall of the holder is spherically curved.
When the screws are tightened to mount the device upon the transom, the shield bears against the curved area of the holder end wall and compressibly deforms the material of the holder.
This flattens the engaged area of the holder into tight frictional contact with the surface of the shield.
In this way, the selected universal adjustment of the holder is retained.