Our LVLBY43T is a 4 inch wide recessed trim-less ("mud-in") architectural linear recessed light fixture. It features an integrated plaster bead which allows one to sand and finish ("mud up") right to the diffuser leaving a clean 4 inch wide line of lighting with no visible trim or flange. Our LVLBY43T features an integrated power supply allowing one to connect the fixture directly to the "line voltage" source of the home or building (120-277 or 347VAC Input). Our LVLBY43T delivers high output lighting, and its 4 inch wide design makes it an excellent solution for commercial, retail, and residential general lighting application. It is sold in standard lengths ranging from 2ft to 8ft, but can be customized or linked together for seam-less continuous runs of flush mounted 4 inch wide lighting.(Contact-Us for Custom Sizes, Colors, or Shapes (MOQ may apply).