Dimmable LED Flat Panel Troffers from MaxLite, $50 - $100, where Line Voltage is 120V, Width is 18" - under 30", Color Temperature (Kelvin) is 4000-4999, and Fluorescent Equivalent is 50W - 100W
$112.98($56.49 per Fixture)
$158.38($79.19 per Fixture)