Free Delivery on all orders over £99*

3.5W LED Emergency Downlight 5500K - Black (Maintained or Non-Maintained)

£3399
The RRP is the manufacturer's recommended retail price of the item.
180 In Stock - Ready to Ship
We are an Independent UK Company
Price match. Found it cheaper? Contact us
Trade Discount Available
Description

The Knightsbridge EMPOWER4BK is a 3.5W LED emergency downlight with an integrated LiFePO4 (lithium iron phosphate) battery providing a minimum 3-hour backup illumination at 140 lumens. The fitting operates in either maintained mode (permanently illuminated) or non-maintained mode (illuminates only on mains failure), selectable during installation. A separate green LED charge indicator shows battery status without opening the fitting.

Designed for commercial corridors, escape routes, stairwells and residential fire-safety compliance, the downlight recesses into ceilings with a minimum 80mm void depth behind a 45mm cut-out. The 60mm black polycarbonate bezel sits flush with the ceiling plane once installed. The fitting ships with a pre-wired battery pack and a corridor lens accessory in the box, giving a narrow beam pattern suited to long hallways where wider spread would waste light.

The 5500K daylight colour temperature provides high visual clarity for navigation during power outages, contrasting with the warmer 2700K-3000K ambient lighting typically used in residential and hospitality spaces. The IP20 rating limits the fitting to dry indoor locations. The polycarbonate construction and Class II double-insulated design mean no earth connection is required, simplifying installation on older wiring where earth availability may be inconsistent.

The LiFePO4 battery chemistry offers longer cycle life and better thermal stability than standard lithium-ion cells, with the L70B50 rating of 30,000 hours indicating the fitting retains 70% of initial light output after 30,000 hours of operation. A manual emergency test button on the driver allows periodic compliance testing without cutting mains power to the circuit.

Specification
Diameter 60 mm
Length 183 mm
Recessed Depth 32 mm
Minimum Void 80 mm
Cut-out Diameter 45 mm
Construction Polycarbonate
Finish Black
Class II
IP Rating IP20
Primary Voltage 230V 50Hz
Cable Length 0.35 m
Emergency Maintained / Non-maintained / Switched
Lamp Technology LED
Lamp Included Yes
Dimmable No
L70B50 30000
Beam Angle 140
CCT 5500 K
Light Colour Daylight
Lumens 140 lm
Lumens (Em. mode) 140 lm
Wattage 3.5
Efficacy 40 lm/W
CRI >70
Warranty 5
Downloads

Product Specification Sheet

Product Manual

Frequently Asked

What is the difference between maintained and non-maintained mode?

In maintained mode the downlight remains permanently illuminated when mains power is present, switching to battery backup during a power cut. In non-maintained mode the downlight only illuminates when mains power fails. The mode is selected during installation via a switch on the driver.

How long does the battery last on a single charge?

The LiFePO4 battery provides a minimum 3 hours of emergency illumination at 140 lumens once fully charged. The green LED charge indicator shows when the battery has returned to full charge after a discharge event.

What ceiling void depth is required?

A minimum 80mm void depth is needed above the ceiling to accommodate the driver unit and battery pack. The downlight itself recesses 32mm into the ceiling through a 45mm diameter cut-out.

Can it be used in bathrooms?

No. The IP20 rating limits the fitting to dry indoor locations only. Bathrooms, kitchens and other moisture-prone areas require a minimum IP44 or IP65 rating depending on zone.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

See it lit, in person

Lighting looks different in a real room. Come and see our range at our showrooms in Birmingham, Hong Kong and Dubai, or talk to our design team wherever you are.

Niori lighting showroom trailer video with closeups of alabaster lighting

Why Niori

Over 20 years lighting homes worldwide

We are a specialist lighting and mirror retailer with showrooms in Birmingham, Hong Kong and Dubai, shipping to customers around the world. Our own design team is here to help, from first idea to final fitting.

Genuine products

An authorised stockist

Every product arrives brand new with the full manufacturer warranty. Found it cheaper elsewhere? Ask us about a price match.

Light source

Integrated LED

Energy-efficient integrated LED, ready to install with no bulbs to buy.

Ordering with us

Free delivery over £99

Free delivery on orders over £99, in the UK and worldwide. Easy returns within 14 days, subject to our returns policy. Full manufacturer warranty included.

Design help

Not sure what you need?

Our design team can help you plan your lighting, share photos and videos of stock, and send samples worldwide. Book a showroom visit in Birmingham, Hong Kong or Dubai, or ask about our lighting design service.

You Might Also Like

Recommended For You

    Our Reviews

    From first click to final installation, our customers share how Niori lights up their spaces. Read their words and envision what’s possible for yours.

    Featured Projects

    Step into our portfolio and see how we transform homes, restaurants, and commercial spaces and more, worldwide. Click here for a closer look at our latest projects.

    Description

    The Knightsbridge EMPOWER4BK is a 3.5W LED emergency downlight with an integrated LiFePO4 (lithium iron phosphate) battery providing a minimum 3-hour backup illumination at 140 lumens. The fitting operates in either maintained mode (permanently illuminated) or non-maintained mode (illuminates only on mains failure), selectable during installation. A separate green LED charge indicator shows battery status without opening the fitting.

    Designed for commercial corridors, escape routes, stairwells and residential fire-safety compliance, the downlight recesses into ceilings with a minimum 80mm void depth behind a 45mm cut-out. The 60mm black polycarbonate bezel sits flush with the ceiling plane once installed. The fitting ships with a pre-wired battery pack and a corridor lens accessory in the box, giving a narrow beam pattern suited to long hallways where wider spread would waste light.

    The 5500K daylight colour temperature provides high visual clarity for navigation during power outages, contrasting with the warmer 2700K-3000K ambient lighting typically used in residential and hospitality spaces. The IP20 rating limits the fitting to dry indoor locations. The polycarbonate construction and Class II double-insulated design mean no earth connection is required, simplifying installation on older wiring where earth availability may be inconsistent.

    The LiFePO4 battery chemistry offers longer cycle life and better thermal stability than standard lithium-ion cells, with the L70B50 rating of 30,000 hours indicating the fitting retains 70% of initial light output after 30,000 hours of operation. A manual emergency test button on the driver allows periodic compliance testing without cutting mains power to the circuit.

    Specification
    Diameter 60 mm
    Length 183 mm
    Recessed Depth 32 mm
    Minimum Void 80 mm
    Cut-out Diameter 45 mm
    Construction Polycarbonate
    Finish Black
    Class II
    IP Rating IP20
    Primary Voltage 230V 50Hz
    Cable Length 0.35 m
    Emergency Maintained / Non-maintained / Switched
    Lamp Technology LED
    Lamp Included Yes
    Dimmable No
    L70B50 30000
    Beam Angle 140
    CCT 5500 K
    Light Colour Daylight
    Lumens 140 lm
    Lumens (Em. mode) 140 lm
    Wattage 3.5
    Efficacy 40 lm/W
    CRI >70
    Warranty 5
    Downloads

    Product Specification Sheet

    Product Manual

    Frequently Asked

    What is the difference between maintained and non-maintained mode?

    In maintained mode the downlight remains permanently illuminated when mains power is present, switching to battery backup during a power cut. In non-maintained mode the downlight only illuminates when mains power fails. The mode is selected during installation via a switch on the driver.

    How long does the battery last on a single charge?

    The LiFePO4 battery provides a minimum 3 hours of emergency illumination at 140 lumens once fully charged. The green LED charge indicator shows when the battery has returned to full charge after a discharge event.

    What ceiling void depth is required?

    A minimum 80mm void depth is needed above the ceiling to accommodate the driver unit and battery pack. The downlight itself recesses 32mm into the ceiling through a 45mm diameter cut-out.

    Can it be used in bathrooms?

    No. The IP20 rating limits the fitting to dry indoor locations only. Bathrooms, kitchens and other moisture-prone areas require a minimum IP44 or IP65 rating depending on zone.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.