The Parmida LED Technologies™ 4FT LED Direct Wire Type B T8 tube can be installed by a simple bypass of the ballast. This frosted 2200lm tube can be installed with a single-ended or double-ended connection and it can install directly into your fixture’s original shunted sockets (tombstones). This eliminates the need to retrofit your fixture with non-shunted sockets. This tube is UL-Listed.