Every year there are more and more jet ski accidents in the United States. In fact the number of deaths per year is increasing. It would be smart to outfit such water toys with bright white LED flashing lights. To insure that these lights work consistently in the water; I propose that we use some new technology being introduced in consumer flashlights. As the jet ski hops across the wake and waves the vibrational energy can shake the power system to keep the flashing lights on. The bumps on the water can power up the anti-collision warning lights using electromagnetic induction technology to charge a capacitor instead of the lights working off a battery.
Currently there are some nifty micro-flashlights being used which you can buy which use a similar technique and are available thanks to the Everlight Flashlight technology research lab. These smaller flashlights work by shaking them for about thirty seconds and shine for about 6 minutes and they shine quite bright since they use a very bright LED light. Here is a link to this home use flashlight:
Here is a quick movie you can watch online to see how this technology works.
I propose we use the engine rumble to light up the dashboard of the jet ski and anti-collision flashing lights. Generally you have to wait thirty seconds for the engine's oil pressure to come up anyway and thus the anti-collision warning system will light up right away. As the jet ski moves faster over the waves it will automatically increase the intensity of the light and make it brighter, thus adding more safety.
This does not mean that the anti-collision lights would not be hooked up to a battery, only that you would not be asking for any juice. If they get too dim from too smooth of water, yah, we wish, then the system would revert back to the battery. Perhaps this is a good way to save lives on the water? Think on this.