I spent approximately 2 years working on a solar powered lighted buoy system. My goal was to make a system that would automatically turn on each night as the sun set, expanding the amount of time we could ski and adding some ambiance to the lake as it got dark. Nothing better than sitting back with a few beers looking at a course lit up like a Christmas tree. I showed my system to Dave Goode and he immediately loved it. We started working together to come up with a design and found that the 2009 Big Dawg finals were slated to ski under the lights at night. The the project took a turn and was developed to light up that course, in a reliable way. That tournament was the first tournament to ever use lighted buoys. I flew out to FL to attend the night finals, as a spectator, and make sure the buoys performed as they should and everything worked great. I had no plans on going to nationals that year, but these lighted buoys got me there. Ironically, I won the M3 division the next day. Obviously, I am really glad I made the trip. Goode still has the power buoy, but they require each buoy to be turned on, manually. This works great for competitions, but is not ideal for the average lake.
My solar prototypes worked and would charge each day and light up every night. It was beautiful! I used landscape lighting products form local hardware stores to make working prototypes. I had a solar panel that floated 12 inches below the surface of the water that would recharge each day. This solar panel also had a photocell that would turn on the light each night and each buoy would stay lit the entire night. The light was inserted into a traditional buoy with some hardware that clamped the light into place and created an airtight seal. This worked on our lake, as it is very clear. Don't know if it would work on lakes with lots of particulates or algae in the water.
I still think that there is a market for these automatic solar lighted buoys, but that market is very small. The R&D, tooling and manufacturing costs would not make sense, in my option.
Would love to see it happen, as I think, similar to landscape lighting at a house, these lighted buoys would give you something really beautiful to look at each night. They would also extend the ski able hours in the day by about an hour.
I still have a pile of stuff in my basement and if I get some time, might decide to pick up where I left off.
The video that @BrennanKMN posted above is Dave Goode's lake in Ogden, UT lit up with the power buoys.
Jeff Milford