I believe that the way you do this is protocol and dosing. If you put these in ductwork then you need to look at the flow rate through the duct and the require

I believe that the way you do this is protocol and dosing. If you put these in ductwork then you need to look at the flow rate through the duct and the required light flux and then ensure that the supplied flux is well in excess of that. Remember we're not talking about your normal LD50 toxicity. It doesn't kill by metabolic disruption. It kills by turning the thing from organism into not organism. If an organism survives it does so not by adapting its metabolism to the poison. It does so by enough of itself not being destroyed that it is able to rebuild.