Review on Cloudy Bay 8W Dimmable LED Track Light Head, 4000K Cool White CRI90+ True Color Rendering, Adjustable 🌩️ Tilt Angle Track Lighting Fixture, 40° Angle for Accent Retail, Black Finish, Halo Type - Pack of 6 by Jesse Azuse

I ordered three sets of these 'heads' to replace the old 1980's track lights in our guest house. The delivery was lightning fast! The only problem I had was "screwing" the new heads into the rail. Very hard and I was afraid of breaking them. So I used household clear oil for each of the three contact lugs on each head. I then inserted the contacts into the rail's groove and slowly turned them (with pliers) clockwise until they snapped into place. They work great and the old 1980's dimmers that were in there worked great with them. Good buy!