I also use two large electrostatic precipitators. My 3M Ultra Allergen Filtrete 1250 works better than anything else. Mold sporulates in darkness. When the spores are released to float though the air they are in a most fragile form, much like tender little babies. The U.V. light I have selected is a Phillips Germicidal U.V light., product number G15T8.
Mold spores are even more sensitive.
We recommend that you keep the light behind a dresser, refrigerator, or in a return air duct. It will cause carpets and furniture to fade just like very bright sunlight . Do not look directly into this light because it will cause severe and immediate eye damage, especially to children. Warn all adults and children not to look at the light. Do NOT place this light where children can look directly at it.