Super bike security system

Here's what I'm looking at so far

Seems like those weatherproof cameras will kill a two birds with one stone.
I can use them for motion sensing and picture taking.

Here's some weatherproof arduino proximity sensors

Someone already did part of my job for me

I remember/know little about arduino coding I'll need to brush up.

Now sure how I should go about flashing the lights on the bike.
Since I will effectively need to leave the lights mechanically switched on for this to work I should probably tap into those camera light sensors to automatically turn on when it's dark and I'm riding.
I guess a relay should work fine.

What do you think? Does this all sound reasonable?