VT1
Your best bet is to visit a few busy airfields and look at the strobes in use. I fitted a high intensity strobe to the tail of my machine. This was on the basis that I stood a chance of seeing stuff coming at me from the front but people overtaking me from the rear was the big problem. The strobe uses solid state tec and consumes a max of 2a. It is very bright on the ground, but has proved to be of very little use in the air.
The number of mid air collisions in the UK is very small. This thread has, to some extent, made it seem that we all bump into each other every day. I have had a number of close encounters, but most have been in the circuit.
Rod1