AMERICAN ULTRAVIOLET Lesco SUPERSPOT MK III, Technical Reference Manual, Page: 11 / 54

KMM1002P
9
3.1.2. UV Bulb
The UV bulb is an efficient 100-watt short arc DC mercury vapor lamp. The lamp needs
a high voltage ignition pulse in order to start. Once ignited, it requires one or two minutes
to reach its operating voltage and current. This period is referred to as the "warm-up"
time. Maximum bulb life is obtained when the lamp operates without interruption, 24
hours a day.
Frequent ON-OFF operations shorten bulb life. The deterioration varies with duty cycle
(number of operating hours per start) and with electrode temperature at the time of start
(cold strike vs. hot or warm restrike), rendering it impossible to assign a conclusive value
to bulb life under intermittent operation.
As a general rule, it is recommended that if the unit is to be used again within the next
4 hours, it should be left ON with the shutter closed.
3.1.3. Bulb Connection
The black lead wire coming from the bulb and the red lead wire from the reflector holder
assembly correspond to the same colored sockets located in the reflector support block.
Please ensure the black lead wire runs through the access hole on the bottom of the
reflector holder as pictured below.
Bulb Connection
***CAUTION***
Do not touch the quartz (glass) portion of the bulb with bare hands or fingers.
Skin oils can cause premature lamp failure or explosion. If hand oils accidentally
contact the bulb, wipe clean with Isopropyl alcohol and lint free cloth.