I agree, with so many cars now having day time running lights, it appears to me that bikes are blending in even more. Here in Northwest Oregon, bikes on the road may be motorcycles as well as bicycles. And I'm noticing that even the bicyclists are adding flashing headlamps to get the attention of the car drivers.
The majority of modulators that my friends and myself have installed, are simple to install. The modulator sits between male and female headlamp plugs and is inserted between the headlamp and its power connector. An important item to note is that the daylight sensor should not be pointed towards lights on the bike or pointed forwards so that on coming headlights fool the sensor into thinking its daylight and start flashing your high beams at the on coming traffic.
