ELP LDCK/425 – Emergency Downlight Power Supply

LDCK/425 Common Data

LDCK/425 Electrical Data

Light source Nichia white LED
Colour Temperature 4500K
IP Rating (Front) IP22
Ambient Temperature (Ta) 0°C – 40°C
Insulation Class Class II
Supply Voltage 230V ~ 50Hz
Cut-out 18.5mm diameter
Lumens (Emergency) 135lm @ 350mA / 240lm @ 700mA

The LDI3/18 is a small and very discreet LED light pod with an injection moulded thermally conductive plastic body acting as a very effective heat sink and incorporating an 18mm thread and lock nut for simple installation. (NB: Requires 18.5mm clearance hole with access to the rear). The LDI3/18 light pods (white or black front bezel) offer two distribution types.

For emergency lighting applications the LDI3/18 light pods incorporate an integral green/red bi-colour indicator suitable for standard emergency or Self-Test/DALI emergency.

Standalone ceiling recessed emergency lights are self-contained, unobtrusive safety lighting fixtures that blend into ceilings to provide illumination during power failures. They are designed for quick installation in commercial or residential settings, usually featuring a small LED downlight head and a hidden battery pack within the ceiling void, offering at least 3 hours of illumination.

Key Features and Types

Self-Contained Power: These units operate independently, with their own built-in rechargeable battery and charger, removing the need for a central battery system.
Operation Modes:

Non-Maintained: The light only turns on when the main power fails (common for escape routes).

Maintained: The light stays on constantly (using mains power) and switches to the battery during a power failure, often used in public areas.

Discreet Design: Typically featuring a small, white, or black circular bezel (often 40mm to 50mm diameter), they sit flush with the ceiling for a minimal aesthetic.

Lighting Optic Options: Available with different lenses, including corridor (for long, narrow paths) and open area (for wide-angle illumination).

Technical Specifications

Battery & Runtime: Usually feature LiFePO4 (Lithium Iron Phosphate) batteries providing 3 hours of emergency power.

Light Output: Ranges typically from 100 to 300 lumens.

Colour Temperature: Commonly 6000K – 6500K (Daylight White) for maximum visibility.

Lifespan: High-performance LEDs with 30,000 to 50,000+ hours.

Testing: Many models now include “Self-Test” functionality (DALI or automatic), which simulates power failures to test the battery and LED health, indicating faults via a built-in LED indicator.

Installation and Compliance

Installation: Designed as “plug-and-play” with quick-fit connectors, passing through a small cutout in the ceiling.

Components: A typical kit includes the LED head, a driver, and a battery pack that fits into the ceiling void.

Compliance: Units are generally CE and UKCA marked, meeting BS EN 60598-1 and BS EN 60598-2-22 standards.

IP Rating: Commonly IP20 (indoor), with some options for higher IP65 ratings for bathrooms or damp areas.

Established in 1995 and based in the South-East, we are a team of experts with unrivalled knowledge and experience in safety lighting products, devices, and electronic circuits. We hold a vast range of stock onsite which means no long lead times for your commercial project. Therefore, if we have the products in stock that you need, we aim to get them to you the very next day.

We don’t just sell products we also develop them in-house. We specialise in manufacturing emergency lighting equipment and have vast engineering capabilities, so we can supply you with exactly what you need while meeting legal requirements. We also customise existing products and create bespoke orders as part of our assembly and emergency lighting conversion work. Our technical support team is always available to give respected advice and support.

Our offering includes comprehensive testing to ensure all products are fully functioning and compliant with current regulations when they leave our site.