UVGI Dosage Calculation for the NQ1500

The calculation of efficacy of the ultra violet lamps is a function of the resident time of the bacteria within sight of the ultra violet light and the intensity of the light within this "Kill Zone".

Resident Time = CFM/area/lamp length/60 seconds per minute.
= 1500/6.35 sq.ft. = 252 fpm/60 = 3.09 feet per second
= 3 feet/3.09 feet per second = 1 second
Lamp Intensity

= 120 microwatts/cm squared at 1 meter (mfg data)

(intensity multiplier at 5.2" = 39.37"/5.2"
= 7.57 squared, from N.A. Philips Lighting Handbook)

= 7.57 x 7.57 x 120 microwatts/cm squared at 5.2"
= 6,876 microwatts per cm squared

Reflection of light at cabinet surface = 1.5 increase in intensity
Total Efficacy = 1 seconds x 6,876 x 1.5 x 4 lamps
= 41,268 microwatt-seconds/cm squared