here are some info on them
the design was made by one of the ausy christmas member ,,, his name is Maggi ,,, he design them because of the failure /corrosion of other pixel on the market .... they are bigger // wider than average so water will not go in ,,,,,then he authorize ray to sell and market them .... as a test he put them in water for 24 hours all light on then he put them in the freezer ... they became block of ice ,,, and still on .... there is also some other element to waterproof them that i don't understand but ... they are suppose to kick ass .... more to fallow after they spend 1 winter here where we have snow .. rain ..freezing rain and hail ... .... cheer
as for the c9 cover they will be screw type on ... and they also come with end tail at both end ready to go ...cheer