The EverLight LED track mount has a very limited range of motion, unless mounted exactly as instructed, which is fine with new buildouts but upgrading an older room without the required dimensions maybe problematic. I had the old DentalEZ DayRay lights, and they lasted 25+ years, had great articulation and range of motion, and the chair did not need to be exactly centered. The light itself is great—one of the highest lumens versus competitors. I chose this light partially because I did not like the hands free on/off feature on a competitors light, due concern with reliability—like with frustrating hands free public bathroom sinks. I've never written a review before, but I felt obligated after the amount of money sunk into this light.