i bought outdoor rope lighting from target's clearance section (i think they cost about $5). the package also included the necessary plastic clips and screws needed for attaching the lights to our wooden fence. i roughly laid out the word 'hey' on the ground just to make sure that i had enough lighting for the whole word. the package also came with plastic tightner straps so where you see that the tubing overlaps and loops, i've used a tightner to attach the two. letter by letter i drilled the plastic clips onto the fence and attached the rope lighting.
there you have it: some fun lighting just in time for dusk ♥
p.s. please make sure to also use an 'outdoor' extension cord