Liteplan MST/3/3W/NM – 3W Self-Test Non-Maintained 700mA LED Emergency Driver

MST/3/3W/NM Specifications 

Part Number MST/3/3W/NM
Mains Supply 230-240V AC 50/60 Hz
Power Rating 28.8mA λ = 0.44
Duration 3 Hours
Recharge Period 24-Hours
Battery Size & Type 3.6V 4.5Ah NiCd Cells
Charge Current 200mA
Battery Current Limit 1000mA
Overall Weight (with LED) 0.61Kg
Max Ta and Tc Ta – 50 °C – Tc – 70 °C
Max Battery Temperature 55 °C
Battery Discharge Current 1000mA nominal
Discharge Voltage Cut Off 3.0 Volts
Ingress Protection IP20
Mains Plug Input Cable 1.0mm² – 1.5 mm²
Module Dimensions (LxWxH) 150mm x 26.5mm x 28.5mm

MST/3/3W/NM Dimensions

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.

Liteplan are the largest, privately owned emergency lighting component supplier to the UK market, whilst also shipping their products to a worldwide customer base. Established in 1994 by the late Bill Green, the company was successfully run by Bill’s right hand man, Peter Ray for many years. Peter retired in 2022 and Liteplan is now run by the next generation of Bill’s family with his son, Steve Green at the helm as Managing Director and Steve’s brother-in-law, Jonathan Bell as Director of Operations. Their Business Development Director, Adrian Spicer is a long standing and well respected figure in the world of emergency lighting. His knowledge and stature within the industry are invaluable to them.

Liteplan’s wealth of knowledge extends many years. Their Technical Manager, David French BSc. sits on the committee at ICEL and works closely with The LIA. Their Product R&D Manager, Osman Özgür Rakibet, PhD, takes control of Liteplan’s product road map. His knowledge is steering their evolution and maintaining their position as the innovators of the emergency lighting sector.

Many of Liteplan’s engineers have worked with the company for over 20 years, constantly striving to progress through the our ever evolving CPD scheme to stay at the forefront of the ever changing world of legislation.

Liteplan proudly design all of their products in-house, making product evolution a constant and seamless process. They employ over 60 local personnel, many of whom have been with them for the majority of their existence and they also pride themselves on their unrivalled delivery satisfaction level.

Their 40,000 square foot factory enables them to carry a huge level of stock, thereby fulfilling even the largest of orders with haste. They recently acquired additional warehousing adjacent to their headquarters near London’s M25. This will fuel Liteplan’s global expansion plans for many years to come.