A mounting arrangement for a light or other object includes a clamping
arrangement, or a keying arrangement, or both a clamping and a keying
arrangement for mounting to different mounting rails having different
keying features. The clamping arrangement includes a fixed clamp member
and a movable clamp member that is movable towards and away from the
fixed clamp member and is biased towards the fixed clamp member, so as to
grip a mounting rail therebetween. The keying arrangement employs
interchangeable keying members that may be disposed in a recess of the
light or other object and that may have different keying features for use
with mounting rails having corresponding keying features.