"Used this track light set (purchased 2 units) to replace existing lights while renovating a family room. Installation was hampered by drop celling and had to obtain a couple of standoffs (not provided) so the light fixture would not compress the ceiling tile. Overall the lamps articulate well and stay in place and installed well. The first installation went without a hitch. The second install ; had a faulty lamp socket and it was returned. The replacement had a loose wire (not seen on the install) and to take it apart as well and repair to re-install. (Quality assurance ??) Used 50watt bulbs, a little bright for our taste, will be changed to 35watts soon. The lamps generate a lot of heat, make sure they are away from combustables."