I'm pretty sure ozone lights create ozone (O3) by reacting with the O2 in the troposphere (the lowest layer in the atmosphere). Plants do not need O3 to survive, but, in nature, it helps curb bacteria growth of bad bacteria and acts as a sunscreen. It exists in the troposhpere at an aproximate rate of 10% by atomic weight.
With increased O3 levels in a grow room with artificial light, you could have problems with having a diluted PAR spectrum (photosynthetically active radiation spectrum) and it could possible decrease the intensity of your lights over all. It could also possibly kill beneficial bacteria in your soil or on the surface of the leaves. If you are running a sterile environment, then the bacteria wouldn't matter very much and actually might be a good thing, but I would be most worried about my plants not getting enough light intensity, and, in turn, putting out decreased yields.