Seemed solid enough but my problem was that the two led lights for either color (dual color model) cast a really annoying light pattern since they are set off to the side of the ring and there is no diffuser. It looks like the light should be aimed nicely but its not really the case. Returned item.

Attractive appearance, but poorly thought out design. All panels in my aircraft are removable for maintenance, but this light must have the wires disconnected to remove the panel (the nut is installed on the backside, unlike virtually every other device in the airplane). I installed a connector on the wires as a solution, but it is far easier to remove the face nut on all other devices without disturbing the wires. Another problem is this device has reversed the usual circuit for dual color lights this device has a common power lead, and separate ground leads for the red and white circuits, rather than the customary common ground and separate power leads. All other dual lighting in my plane has red / white power leads on a switch, and I had to duplicate the circuitry (to a single DPDT switch) to switch ground leads for these lights.

Bought 6 of the 28 volt. It is the right size and correct amount of light. The problem is the ball does not swivel with you fingers, you must use two hands on the front and back to move it or a pare of pliers. If this unit is mounted on the typical aircraft plastic interior, you will absolute break the panel. The second major issue is the mounting installation is backward. When installed per directions, if removing the interior panel for the annual inspection, you will need to cut the wires to remove them. If the mounting screw were reversed it could be removed without disturbing the wiring. Disappointing.