My question is, unless you have a show car and have strobes and the like......why would you want something like that on your car???
My friend has flashing headlamps on his car

.......
If you are inpatient, you have a little lever that makes the high beams go on.....use that

....and actually in a bunch of states, flashing your high beams is illegal.
Put whatever you want on your car, but don't bi+ch about it when you're in front of a judge
