Ultra-High Intensity UV-A lamps >12,000 microwatts/cm2 are specialty lamps used for applications requiring the lamp to be used:
- at working distances greater than 15″
- when it is not practical to reduce the visible light intensity to less than 2 ft candles (20 lux).
- when the narrow focal point of these lamps is an attribute, i.e., when inspecting the I.D. of tubes.
- when not prohibited by code or there is no code requirement