for my rig, i use key-rings to connect two streetlights together, and a key-ring with a swivel to attach them to my handles. so there's no string or chain, just two streetlights in each hand. be careful with these though -- they're pretty fragile. you might want to find a way to insulate them somehow -- mine are wrapped up in clear packing tape. looks ugly, but in dark conditions and with the lights going, they look just the same -- all you see is the lights.
_________________________
taken out of context i must seem so strange
~ ani di franco