UV Germicidal Radiation Dosage Table

Please note that many variables take place in a real world environment that make actual calculating very difficult (air flow, humidity, distance of microorganism to the UV light and time). However, it is proven that UV light will kill any DNA-based organism given enough dosage and that UV light breaks down DNA over a cumulative basis. Therefore, as air circulates through the ductwork of an HVAC system containing a UV light, like American-Lights^®, the UV light continuously cleanses the air. If a microorganism is not effectively eradicated on the first pass through the ductwork, the UV light will continue to break its DNA down on subsequent passes. In addition, microorganisms typically do not sit in a static environment in HVAC systems except on coils which can be exposed to our lights. In fact, microorganisms breed microorganisms if not controlled. The UV light process helps to reduce the incidence of inhaled exposure of microorganisms in persons who reside or work in buildings with UV light air cleansing systems.

Tests

Tests conducted by Light Sources, Inc - Orange, CT and verified by American Ultraviolet Company - Lebanon, IN revealed the American-Lights^® 36 watt High Output Germicidal Lamp produces 800µW @ 1 foot with 534 feet per minute air flow @ 55º Fahrenheit. To compute time needed to sterilize microorganisms in the following chart at 1 foot distance from the light, simply divide the dosage required by 800. Example: for 90% kill factor of Bacillus subtilis spores:11,600 divided by 800 = 14.5 seconds.

The following are incident energies of germicidal ultraviolet radiation at 253.7 nanometers necessary to inhibit colony formation in microorganisms (90%) and for complete destruction:

Organisms:	Energy dosage of Ultraviolet radiation in µW sec/cm² needed for kill factor
Bacteria	90%	100%
Bacillus anthracis - Anthrax	4,520	8,700
Bacillus anthracis spores - Anthrax spores	24,320	46,200
Bacillus magaterium sp. (spores)	2,730	5,200
Bacillus magaterium sp. (veg.)	1,300	2,500
Bacillus paratyphusus	3,200	6,100
Bacillus subtilis spores	11,600	22,000
Bacillus subtilis	5,800	11,000
Clostridium tetani	13,000	22,000
Corynebacterium diphtheriae	3,370	6,510
Ebertelia typhosa	2,140	4,100
Escherichia coli	3,000	6,600
Leptospiracanicola - infectious Jaundice	3,150	6,000
Microccocus candidus	6,050	12,300
Microccocus sphaeroides	1,000	15,400
Mycobacterium tuberculosis	6,200	10,000
Neisseria catarrhalis	4,400	8,500
Phytomonas tumefaciens	4,400	8,000
Proteus vulgaris	3,000	6,600
Pseudomonas aeruginosa	5,500	10,500
Pseudomonas fluorescens	3,500	6,600
Salmonella enteritidis	4,000	7,600
Salmonela paratyphi - Enteric fever	3,200	6,100
Salmonella typhosa - Typhoid fever	2,150	4,100
Salmonella typhimurium	8,000	15,200
Sarcina lutea	19,700	26,400
Serratia marcescens	2,420	6,160
Shigella dyseteriae - Dysentery	2,200	4,200
Shigella flexneri - Dysentery	1,700	3,400
Shigella paradysenteriae	1,680	3,400
Spirillum rubrum	4,400	6,160
Staphylococcus albus	1,840	5,720
Staphylococcus aerius	2,600	6,600
Staphylococcus hemolyticus	2,160	5,500
Staphylococcus lactis	6,150	8,800
Streptococcus viridans	2,000	3,800
Vibrio comma - Cholera	3,375	6,500
Molds	90%	100%
Aspergillius flavus	60,000	99,000
Aspergillius glaucus	44,000	88,000
Aspergillius niger	132,000	330,000
Mucor racemosus A	17,000	35,200
Mucor racemosus B	17,000	35,200
Oospora lactis	5,000	11,000
Penicillium expansum	13,000	22,000
Penicillium roqueforti	13,000	26,400
Penicillium digitatum	44,000	88,000
Rhisopus nigricans	111,000	220,000
Protozoa	90%	100%
Chlorella Vulgaris	13,000	22,000
Nematode Eggs	4,000	92,000
Paramecium	11,000	20,000
Virus	90%	100%
Bacteriopfage - E. Coli	2,600	6,600
Infectious Hepatitis	5,800	8,000
Influenza	3,400	6,600
Poliovirus - Poliomyelitis	3,150	6,600
Tobacco mosaic	240,000	440,000
Yeast	90%	100%
Brewers yeast	3,300	6,600
Common yeast cake	6,000	13,200
Saccharomyces carevisiae	6,000	13,200
Saccharomyces ellipsoideus	6,000	13,200
Saccharomyces spores	8,000	17,600