Deep-SeaLite®
User
Manual
6/19/02
3
14
2.5
12
1.5
Current Requirements: The current draw of a particular lamp is determined by dividing the lamp
wattage by the lamp voltage. It is worthwhile to note that if high voltage (greater than 110 volts)
current is being used to power the light, there is still a voltage drop over the length of cable, but
the amperage is often small enough (due to the high voltage) that the voltage drop is less
significant. The power supply must still provide the necessary power; a 120 volt-1000 watt
generator will only power 1000 watts' worth of lights at 120 volts.
Cold Filament Surge: Upon initial power-up of the lamp, it takes a great amount of energy to
heat up a cold lamp filament--up to 10 times the operational current draw for a short period. The
power supply must be capable of providing not only the necessary voltage and sustained
operational current draw of the lamp, but must also provide this temporary high current. Many
power supplies have built-in safety foldback circuits to protect the power supply (and powered
equipment) from accidental short circuits. The cold filament current surge may appear to the
power supply as a direct short circuit, and so will trip the foldback circuit. It is often necessary
to modify the power supply to desensitize this foldback circuit in order to allow the momentary
high current necessary to heat the filament. We suggest that the power supply manufacturer's
application recommendations be followed whenever applicable.
Varying Operational Voltages: The various lamps will operate at voltages other than the
nominal recommended voltage, affecting lamp life and color temperature. Undervoltage will
increase lamp life, while overvoltage will rapidly decrease lamp life.
Connector Options: Three different industry standard underwater connectors can be used with
the Deep-SeaLite®: a Subconn-type 3-pin male bulkhead connector, model BH3M, a right angle
connector LPBH3M, and an XSG-3-BCL. The standard connector pinouts are illustrated below.
Figure 1: Standard Deep-SeaLite® Connector Pinouts
1
2
3
BH3MP
1 = Hot
2 = Neutral
3 = Ground to shell
1
2
3
LPBH3MP
1 = Hot
2 = Neutral
3 = Ground to shell
1
2
3
XSG3BCL
1 = Ground to shell
2 = Neutral
3 = Hot
