A lighting system comprising a system housing, a plurality of lighting units and first and second conductors electrically connected to said plurality of lighting units. The lighting units comprising a housing including a top portion and a bottom portion, a plurality of light emitting elements on a printed circuit board (PCB) within said housing. The top portion and bottom portion adapted to be coupled together to form the housing and form a seal to protect the components within the housing. The top portion further configured to comprise light altering characteristics so as to direct and shape emitted light from the plurality of light emitting elements.