The XU30D truss is based on a standard X30D truss, but includes a 3-phase 16A universal lighting track, suitable for most common lighting fixture brands. XL30D truss offers all the advantages of a full-flexed truss system but with the added functionality of accommodating your own lighting fixtures. When using this truss in combination with a regular X30D truss, please be aware that the allowable loading needs to be adjusted.