Lumishore Introduces World's First Ultra-Slim Thru-Hull Light

Offering thru-hull security with the hole size and price point of a quality surface mount light.

October 30th, 2017 — Swansea, UK and Sarasota, FL – Lumishore, manufacturer of high-performance underwater LED lighting systems, introduces the THX203, the world’s first ultra-slim thru-hull light. With a shaft of just over 5/8”, 16mm diameter and 3-3/4”, 96mm long, THX203 is ideal for owners seeking the security of a thru-hull fitting with the hull cut out of a surface mount.

The petite thru-hull is type-approved and can be fitted nearly anywhere on transoms, hull sides and bottoms of almost any type of boat up to 80’ / 24m. Simple 2-wire installation with no external drivers make this one of the easiest thru-hull lights to install.

The THX203 yields light output of 5,600 tested and proven fixture lumens with a max current draw of only 2.4 - 4.9 Amps (12/24V DC), that’s twice as bright and double the efficiency when tested against any competing light near its size!

THX203 lights feature a wide 110° beam of light in Lumishore’s ORA Series single colors, blue or white, operated by a standard on/off switch or optional Lumishore Key Fob Remote.

THX203 is constructed of high-quality marine-grade bronze with thermal shock resistant borosilicate glass lens, but is value priced! Backed by Lumishore’s exceptional 2-year no-hassle full warranty.

Lumishore CEO Eifrion Evans commented when announcing the new ultra-slim thru-hull light, “Our customers challenged us to develop a light as easily installed as a surface mount but with thru-hull security. The THX203 meets that challenge. Don’t be fooled by its small size though – it is extremely powerful and a great value in terms of lumens per dollar; it should prove attractive to boat owners who’ve been wanting a quality thru-hull light, but at the price point of a surface mount.”

Key Features & Benefits:

• Meet the world’s first Ultra-Slim Thru-Hull with a shaft of just over 5/8”, 16mm diameter and 3-3/4”, 96mm long

• Featuring the security of a Thru-Hull with a hole size and price point of a Surface Mount

• Up to twice as bright and double the efficiency when tested against any competing light

• Single color (white or blue) with an ultra-wide 110° beam angle for the ultimate flood effect

• Simple 2-wire installation with no external drivers, controlled by a standard on/off switch

• Type approved and backed by Lumishore’s exceptional 2-year no-hassle full warranty

Demo THX203 lights at the Fort Lauderdale Int’l Boat Show, Booth #623, November 1-5; and at METS (Marine Equipment Trade Show), Stand #03-220, November 14-16, 2017.

For full product details and high-resolution images, please send your request to

For more information or an interview, please contact:
Susan James, Head of Marketing, Lumishore, Phone: 207-812-8239,
Eifrion Evans, CEO, Lumishore, Phone: +44 (0) 208 144 1694,

Configure your underwater lighting with Lumishore’s exclusive online configurator:
If you’re unsure of exactly how many lights are right for your boat check out Lumishore’s exclusive online ‘Configurator’, which allows you to choose your boat and then test drive all the various mounting locations, and light models, quantity and color options before you buy.


By Susan James
October 30th, 2017