1.120V only,can not work for 12V,please check your fixture by avoiding return it.
2.F15T8 LED Tube Light-18" (17-3/4" Actual Length) 7W (15W Equivalent), Daylight 5500K, Double-End Powered, Frosted Cover, Works from 85-265VAC - Fluorescent Replacement Bulbs for Under Cabinets Lighting Fixtures
3.F15T8 cw Fluorescent Bulbs,rotated end caps,you can adjust the end caps to make the 18" led bulb lit correct direction.
4.Very natural type light. And frosted cover design be able to avoid light directly in your eyes.
5.Definitely brighter than the standard bulb and throws down about 40% more light.