I have not used them or really know of anyone who has. Reading the data from them makes me think they are using the same idea behind Ozone generators. It uses an ultraviolet part of the color spectrum much like the silver bullet does. They must just combine the ultraviolet with the white and the white over powers it so you don't see the color but it still produces the Ozone. I assume the level it produces is very small and does not travel far from the bulb. In enclosed room it may build up though so use caution. I believe Ozone can damage the stoma of the plant if not just keep it closed and you get the same results from the plant if the stoma is damaged or closed either way it's not good for the plant.

Just something to think about.