ST40 Series – SST Inc. - sunlitest.com ST40 Series. ST40 Series Linear LED Strip Lights can be used for lighting green walls, gymnasiums, grocery stores, warehouses, car washes, and more! The ST40 linear lights … ST40 Series. ST40 Series Linear LED Strip Lights can be used for lighting green walls, gymnasiums, grocery stores, warehouses, car washes, and more! The ST40 linear lights …