Description
42 LED Circular Replacement Lamp for Fluorescent Light Upgrades – 12V / 24V LED Upgrade Board (Screw Terminal)
The Aten 42 LED Circular Replacement Lamp with Screw Terminal Connector provides a simple and professional way to modernise existing low-voltage light fittings without replacing the complete fitting. Designed to operate from both 12V DC and 24V DC systems, this high-output circular LED board replaces older halogen or incandescent lamps with bright, energy-efficient LED lighting whilst allowing you to retain your original light fitting. Featuring an integrated screw terminal connector, it allows installers to connect their own wiring quickly and securely, making it ideal for electricians, vehicle converters, manufacturers and anyone carrying out bespoke lighting installations.
Modernise Existing Light Fittings
Many existing ceiling lights and bulkhead fittings remain perfectly serviceable but use outdated bulbs that consume unnecessary power, generate excessive heat and require regular replacement.
The Aten 42 LED Circular Replacement Lamp allows you to retain the original fitting whilst upgrading the light source to modern LED technology, reducing installation costs whilst dramatically improving efficiency and reliability.
Integrated Screw Terminal Connection
Unlike our pre-wired version, this model features a built-in screw terminal connector, allowing your own supply cable to be connected directly to the LED board.
This provides maximum flexibility during installation and is particularly useful where custom cable lengths, existing wiring or bespoke installations are required.
Designed for 12V & 24V Systems
The integrated electronic regulation allows reliable operation from any 10–30V DC supply, making the lamp equally suitable for both 12V and 24V electrical systems.
Ideal for:
- Motorhomes and campervans
- Caravans
- Boats and yachts
- Horseboxes
- Commercial vehicles
- Off-grid lighting systems
- Emergency and utility vehicles
- Bespoke vehicle conversions
Reliable LED Performance
Unlike many basic replacement LED boards, the Aten 42 LED Circular Lamp incorporates built-in voltage regulation together with protection against voltage spikes commonly found in vehicle electrical systems.
This helps provide stable light output whilst protecting the LEDs from electrical fluctuations, improving long-term reliability.
Bright, Efficient Illumination
Using 42 high-quality LEDs, the lamp delivers bright, even illumination whilst consuming only a fraction of the power required by traditional lighting.
The result is lower battery consumption, reduced heat output and significantly longer service life.
Ideal Applications
- Replacement caravan ceiling lights
- Motorhome interior lighting
- Boat cabin lighting
- Horsebox lighting
- Commercial vehicle interior lights
- Existing low-voltage ceiling fittings
- Bespoke lighting installations
- Vehicle conversion projects
Important Installation Information
This LED replacement board is designed to operate from a 10–30V DC supply only.
Many customers use these boards to upgrade older fluorescent light fittings in caravans, motorhomes, boats and commercial vehicles. Fluorescent fittings do not normally operate directly from 12V or 24V. Instead, they usually contain an internal electronic inverter (or ballast) which converts the low-voltage supply into the much higher voltage required to run the fluorescent tube.
The inverter/ballast must be disconnected or removed before connecting this LED board. Connecting the LED board to the output of the fluorescent inverter will damage the board and is not covered under warranty.
Once the inverter has been bypassed, the LED board should be connected directly to the original 12V or 24V DC supply.
If you’re unsure how your existing fitting is wired, we’re happy to help. Simply email us a photograph of your light fitting (or the inside of the fitting with the cover removed), and we’ll advise how it should be connected before installation.
Key Features & Benefits
- Modernises existing light fittings without replacing the complete unit.
- Screw terminal connector for quick, secure wiring.
- Suitable for both 12V and 24V DC systems (10–30V regulated).
- Built-in voltage regulation for stable light output.
- Integrated voltage spike protection helps protect against vehicle electrical fluctuations.
- Bright, even 42 LED illumination.
- Reduced power consumption compared with traditional lighting.
- Lower heat output and longer service life.
- Ideal for DIY, trade and professional installations.
Choosing the Right Version
This version is supplied with an integrated screw terminal connector, making it ideal where you wish to connect your own wiring. If you would prefer the lamp supplied ready to connect with a factory-fitted cable, please see our 42 LED Circular Replacement Lamp with 15cm Pre-Wired Lead.






