Have you noticed how many people have broken the functionality of the manufacturer installed braking lights? More than once on a single trip from Bacoor to Tagaytay I was faced with a vehicle in front slowing down with no visible warning. Unfortunately I have seen similar before and it seems to be getting more common. Instead of a steady high-power (21W is most common) lamp being illuminated when the driver applied the brakes the vehicle(s) have been modified to cause a rapid flickering of the much less powerful (5W) tail lights. This is most difficult to see in strong daylight and I suspect also less than adequate warning at night.
Is it even legal? Why would anyone tamper with a safety feature on their vehicle?