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Surface Mount Ultra Bright Underwater Light (18W) - 24VDC



Warm White
Cool White
Yellow / Amber



$ 109.42

LED Color: Warm White
Wire Lead Length: 2 Feet

Please Contact an LED Expert for Lead Time

aspectLED's underwater LED lights are bright, energy efficient, and attractively styled, making them perfect for virtually any underwater application. Ideal for installation in pools, spas/hot tubs, ponds, aquariums, waterfalls, water features, fountains, docks, and in marine environments.

This 18W underwater light features 6 of our 3W SMD LEDs and is 6" nominal diameter x 1.25" deep and is designed for surface mounted installation. Available in a variety of colors, as well as RGB, which can be easily controlled via a DMX decoder/driver.

These LED underwater lights are waterproof (with an IP68 rating) and submersible. They feature a stainless steel housing and trim face and come standard with a clear glass trim.

RoHS Compliant

Physical Dimensions & Specifications

Part # AL-UW-SM-18W
Light Fixture Dimensions 6" (150mm) Diameter
1.25" (32mm) Deep
Maximum Submersible Depth 6.5' (2 Meters)
Input Voltage 24VDC
Dimmable No
Power Consumption 18 Watts
Luminous Flux 1050 Lumens for Single Color
1000 Lumens for RGB
LED Type SMD LED Chips
LED Quantity 6 - High Power 3 Watt LEDs
Beam Angle 30 Degrees
LED Type Bridgelux LED Chips
Housing Material 304 Stainless Steel (316 available as special order)
Trim Material Polished 304 Stainless Steel (316 available as special order)
Clear Glass Lens
Operating Temperature 32 to 113 Degrees Fahrenheit (0 to 45 Degrees Celsius)
Weight 3.2 lbs
IP Rating IP68 Submersible
Lens Optical, >85% efficient
Glass Step-tempered 8mm thickness glass
Waterproof Seal Double silicone seal
Suitable Uses Underwater, Exterior Wet Locations
Average Lifespan 50,000 hours
Warranty 1 Year
Standards / Certifications RoHS, CE


  • Easy to install and mount using ABS mounting sleeve
  • Maintenance free
  • Solid-state construction makes for high shock and vibration resistance
  • SMD LEDs are super bright, high intensity and low power consumption
  • Extremely long life: up to 50,000 hours with very low time-luminosity decay
  • No RF interference
  • Standard included lead length is 2 feet. Longer wire lead lengths are available for an additional charge
  • Product must be submerged at all times when turned on for proper heat dissipation


  • Pool lighting (residential and commercial)
  • Waterfalls
  • Ponds
  • Fountains
  • Waterparks
  • Hot tubs and Spas

Installation Guide

Click here to download the installation guide for this product.

Cut Sheet/Specifications

Click here to download the cut sheet/specifications for this product.

IES Files/Other Downloads

Download IES files


Have a question and don't see the answer below? Click here to chat with an LED expert.

What light color should I choose?
Warm White is equivalent to a standard incandescent light color and is most popular for residential applications. It has a slight warm yellow glow to it that many people find comfortable and we are all used to seeing in our homes. It is a 2700-3000K on the Kelvin Light Color Scale.

Cool White is equivalent to a standard CFL or Fluorescent light color and is most popular for commercial applications, although it is also used fairly often in residential. It puts out a pure white without any yellow undertone. It is a 4000-4500K on the Kelvin Light Color Scale.

Neutral White is a very pure white, most popular for commercial applications, although it is also used fairly often in residential. It puts out a pure white without without any blue undertone. It is a 5000-5500K on the Kelvin Light Color Scale.

DayWhite™ most closely replicates natural daylight and does have a slight blue hue to the light output. This is rarely seen in residential applications as the light output can seem a bit harsh and bright, and is most commonly seen in exterior or commercial applications. This is the brightest of the White light color options. It is a 6000-6500K on the Kelvin Light Color Scale.
How do I know what power supply to purchase?
The method to calculate your required power source for a low voltage light installation would be to take the watts per light (in the specs section of the product you are interested in), multiply by the number of fixtures you plan to install, and then add 20% to that total. The resulting number is the minimum number of watts your power supply needs to be, so round up to the next available size power supply.It never hurts to go with a larger power supply. Your lights will only consume the number of watts actually being used when they are on.
Is this fixture UL listed?
Many of our products are UL listed. To confirm, please review the Certifications listed under the product specifications section of the product you are interested in.

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aspectLED HeadquartersCorporate Headquarters & Main Production Facility
aspectLED, Inc.
3735 Dunlap Street North
Arden Hills, MN 55112 USA

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