the ones that i have have a regulator to just increase and decrease the flash frequency...like 1 flash a second or more...something like that...it doesent have flash patterns.......its just two bulbs which have like a plastic tube which can fit into ur headlight...
i dont know he company but its no big shot one...prob thast why the cost diff...
ull can check them out in my car they are in my dikki on the sub and if ull want them just let me know them..
allan |