ELCO Lighting ET616DW LED Stein Track Fixture 10W 3000K 800lm 120V - White Finish UPC_732180435937 which just means they work

which just means they work in various setups

- 4 pcs Aluminum Closure Plugs included Dimensions: Width 6-3/8" Height 4-1/2" Volume 54

- Fire rated up to 3 hours in accordance with ASTM E814

California Title 24 compliant (JA8-2016-E)

ELCO Lighting ET616DW LED Stein Track Fixture 10W 3000K 800lm 120V - White Finish UPC_732180435937 which just means they workLED Stein Track Fixture FEATURES : Diecast adjustable track fixture. Integrated driver. 50,000 hours life span. 38 Beam angles standard. Optional lenses for Stein (ET616) 15 (EP719C) or 24 (EP720C) available. Optional lenses for Stein (ET617) 15 (EP722C) or 24 (EP723C) available. 90 vertical adjustment, 358 rotation. Use with ELCO 120V Single or Double Circuit Track. High efficacy COB LED. SPECIFICATION : Wattage 10W 18W Lumens 800 lm 1600 lm Voltage