For sales and information visit

underwater lights limited
TM
Manufacturer of the Original underwater lightsTM Brand
Marine Lighting Products Since 1991
75
TECHNICAL SPECIFICATION
Lamp type - LED 10,000 lumen, 7,200K and Royal Blue
Lamp life - 40,000 hours @ 35C
Driver power supply - 110/240 vac, Power 120 watts.
Inserts - 5083 Aluminium & 316L Stainless Steel.
Insert Lens - Coated Borosilicate glass
Driver output - 32 vdc, 3,3 amps
DMX Control - Can be fitted to driver
Driver and DMX supplied in Aluminium IP 67 Enclosure
NOTE Installation Instruction:
Maximum hull plate thickness should be 12mm for the
flush Plus and 20mm for the 50 degree.
Electrical Information:
Driver - Driver must be fitted minimum 60 cm above
tank top with good ventilation.
Cable - The QT 75 is supplied with 3 meters of
cable with a plug ready to plug into the driver
enclosure socket.
DMX cable is ordered separately.
Additional heat sink plates can be fitted if necessary
For additional information please visit our web site.
50
105
120
FLUSH INSERT
105
140
105
120
50 DEGREE INSERT
SOCKET FOR ADDITIONAL HEATSINK
PLEASE REGISTER YOUR PRODUCT WARRANTY DIRECT TO
WWW.REGISTER-UWL.COM
For sales telephone numbers visit www.qtled.com
THE QT-LED RANGE IS DESIGNED AND MANUFACTURED BY UNDERWATER LIGHTS LTD IN THE U.K.
QT LED - 75 STANDARD
For sales and information visit WWW.QTLED.COM
DESCRIPTION
The Qt LED 75 is a “through-hull” submersible marine
light for welding into steel or aluminium hulls.
The Qt LED 75 is maintained from inside the yacht. To
remove the LED the complete projector must be
unscrewed and replaced.
The light uses our existing standard inserts design.
We advise that the light be installed minimum 250mm
below the waterline when the yacht is loaded with 50%
fuel and 50% water, and that the light be angled 15
degrees downwards. To achieve this there are two
models Flush + and 50 degree.
The high powered flat chip led colour is Cool white
as standard but a blue LED chip is also available on
request.
The LED has a wide beam of 87 degree .
CUTE ON SIZE - BIG ON LIGHT
cute on size big on light
underwater lights limited
Manufacturer of the Original underwater lights
Marine Lighting Products Since 1991
TM
TM
Brand
75
* LENS FITTING INSTRUCTIONS-Remove the blanking plate and check the insert (1) lens landing surfaces are clean and
apply a suitable silicone grease to the gaskets (2). Fit the lens (3), gaskets (2) and lens retaining ring (4) . Hand tighten the cap head
bolts (6) and spring washer (5)making sure the lens retaining ring (4)is square. Torque the bolts to 6 Nm (4.5ft/lbs) in the sequence
shown below, check the ring again and re-torque the screws again to the same setting.
* LED PROJECTOR FITTING INSTRUCTIONS-The LED heat sink body (8) and the ‘O’ring (7) are fully
assembled with three meters of cable connected to a IP 68 plug which plugs directly into the driver enclosure socket. These parts form
one unit that maintains the second containment space should the lens (3) sealing fail. Before screwing the LED projector onto the
insert (1) check that the ‘O’ ring (7) is in place and that the threads are coated with the silicone grease. The front face of the aluminium
bronze connecting ring must make contact with the insert face.
*DRIVER INSTALLATION INSTRUCTION - The driver must be located at least 60 cm above tank top with good ventilation and
the maximum ambient temperature should not exceed 40C. The underwater light is fitted with three meters of cable and a IP 68 plug
that fits into the driver enclosure socket. For cabinet installation see separate sheets.
3
4
6
5
1
8
7
2
*LED Specification for QT-75
*The standard LED- Cool White - 9,600 lumen, 7,200K
Also available in Royal Blue. Rated power at 120 watts.
Part Nos.
Flush
30 degree
50 degree
316 S.S
5083 ALU
QT-75-00300
QT-75-00330
QT-75-00350
QT-75-00600
QT-75-00630
QT-75-00650
PLEASE REGISTER YOUR PRODUCT WARRANTY DIRECT TO
WWW.REGISTER-UWL.COM
For sales telephone numbers visit www.qtled.com
THE QT-LED RANGE IS DESIGNED AND MANUFACTURED BY UNDERWATER LIGHTS LTD IN THE U.K.
QT LED - 75
For sales and information visit WWW.QTLED.COM
*DESCRIPTION - This is a submersible through hull marine light which uses our existing standard FLUSH + and 50 degree insert
(1) part numbers for 5083 ALU and 316 S.S inserts are below. The insert is welded into the hull. Removal of the led light is done from
inside the hull by unscrewing the LED heat sink body (8).
CUTE ON SIZE - BIG ON LIGHT
cute on size big on light
underwater lights limited
TM
Manufacturer of the Original underwater lights
Marine Lighting Products Since 1991
TM
Brand
75
5083 ALUMINIUM & 316L S.S. INSERT INFORMATION
* Insert Angles - The diagram below shows how to select the correct insert for the angle of the hull plate
and the removal of the insert tip to be removed after welding.
* The diagram at the bottom of the page shows a common layout of the underwater light positions.
* Transom - Light spacing 1.5 to 2.0 meters. The light spacing is reduced at the corners of the transom as
the angle of the light swings around to meet the side shell plating.
* Side Shell Plating - The spacing of the first insert (shown as Flush) forward of the 50 degree is 2.0meters.
The spacing is then increased to say 2.5m and can be increased incrementally to 4m.
Underwater Lights Limited provides a free service for positioning the lights and specifying the correct inserts.
So please feel free to contact us.
QT LED 75 HP - FLUSH
QT LED 75 HP - 50 DEG
QT LED 75 - FLUSH
QT LED 75 - 50 DEG
PLEASE REGISTER YOUR PRODUCT WARRANTY DIRECT TO
WWW.REGISTER-UWL.COM
For sales telephone numbers visit www.qtled.com
THE QT-LED RANGE IS DESIGNED AND MANUFACTURED BY UNDERWATER LIGHTS LTD IN THE U.K.
QT LED - 75 INSERT INFORMATION
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