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3.5W LED Self-Test Emergency Downlight 3000K - White (Maintained or Non-Maintained)

£4499
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Description

The Knightsbridge EMPOWER4 is a 3.5W LED emergency downlight with an integrated self-test facility that performs automatic function checks at pre-programmed intervals. The fitting houses an integrated LiFePO4 (lithium iron phosphate) battery rated for a minimum 3-hour emergency duration, delivering 130 lumens in both mains and emergency mode. A separate green LED charge indicator sits externally to show battery status without needing to access the fitting.

Designed for corridors, stairwells, circulation areas and rooms requiring maintained or non-maintained emergency lighting, the downlight operates in three modes: maintained (permanently on), non-maintained (off until mains failure), and switched (controlled by a switch in normal operation). The 45mm cut-out fits standard UK ceiling void depths with a minimum 80mm void required above the plaster line. A corridor lens accessory ships in the box, narrowing the beam for longer throw distances in hallway applications.

The polycarbonate housing and lens are finished in white and rated IP20 for dry internal environments. The pre-wired battery pack connects via a plug-in connector, removing the need to wire terminals during installation. The 3000K warm white LED provides CRI >70 colour rendering across a 140° beam angle. The fitting is Class II double-insulated, requiring no earth connection, and carries a 5-year warranty.

Specification
Diameter 60 mm
Length 183 mm
Recessed Depth 32 mm
Minimum Void 80 mm
Cut-out Diameter 45 mm
Construction Polycarbonate
Finish White
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 3000 K
Light Colour Warm White
Lumens 130 lm
Lumens (Em. mode) 130 lm
Wattage 3.5
Efficacy 35.9 lm/W
CRI >70
Warranty 5
Downloads

Product Specification Sheet

Frequently Asked

What does self-test mean?

The fitting performs automatic function and duration tests at pre-programmed intervals without manual intervention. Test results are indicated by the green LED charge indicator, which flashes different patterns to show pass or fail status.

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

Maintained mode keeps the LED on continuously during normal mains supply and switches to battery power during a mains failure. Non-maintained mode keeps the LED off during normal operation and only illuminates when mains power fails. Both modes are selectable on this fitting.

What ceiling void depth is required?

A minimum 80mm void above the ceiling surface is required to accommodate the driver unit and battery pack. The recessed depth of the fitting itself is 32mm, but the external components need the additional clearance.

What is the corridor lens for?

The corridor lens narrows the beam pattern from the standard 140° spread to a longer, narrower throw suitable for hallway and corridor applications where light needs to travel further along the length of the space rather than spreading wide.

Shipping & Returns

Free worldwide delivery

Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

Returns

30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.

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    Description

    The Knightsbridge EMPOWER4 is a 3.5W LED emergency downlight with an integrated self-test facility that performs automatic function checks at pre-programmed intervals. The fitting houses an integrated LiFePO4 (lithium iron phosphate) battery rated for a minimum 3-hour emergency duration, delivering 130 lumens in both mains and emergency mode. A separate green LED charge indicator sits externally to show battery status without needing to access the fitting.

    Designed for corridors, stairwells, circulation areas and rooms requiring maintained or non-maintained emergency lighting, the downlight operates in three modes: maintained (permanently on), non-maintained (off until mains failure), and switched (controlled by a switch in normal operation). The 45mm cut-out fits standard UK ceiling void depths with a minimum 80mm void required above the plaster line. A corridor lens accessory ships in the box, narrowing the beam for longer throw distances in hallway applications.

    The polycarbonate housing and lens are finished in white and rated IP20 for dry internal environments. The pre-wired battery pack connects via a plug-in connector, removing the need to wire terminals during installation. The 3000K warm white LED provides CRI >70 colour rendering across a 140° beam angle. The fitting is Class II double-insulated, requiring no earth connection, and carries a 5-year warranty.

    Specification
    Diameter 60 mm
    Length 183 mm
    Recessed Depth 32 mm
    Minimum Void 80 mm
    Cut-out Diameter 45 mm
    Construction Polycarbonate
    Finish White
    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 3000 K
    Light Colour Warm White
    Lumens 130 lm
    Lumens (Em. mode) 130 lm
    Wattage 3.5
    Efficacy 35.9 lm/W
    CRI >70
    Warranty 5
    Downloads

    Product Specification Sheet

    Frequently Asked

    What does self-test mean?

    The fitting performs automatic function and duration tests at pre-programmed intervals without manual intervention. Test results are indicated by the green LED charge indicator, which flashes different patterns to show pass or fail status.

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

    Maintained mode keeps the LED on continuously during normal mains supply and switches to battery power during a mains failure. Non-maintained mode keeps the LED off during normal operation and only illuminates when mains power fails. Both modes are selectable on this fitting.

    What ceiling void depth is required?

    A minimum 80mm void above the ceiling surface is required to accommodate the driver unit and battery pack. The recessed depth of the fitting itself is 32mm, but the external components need the additional clearance.

    What is the corridor lens for?

    The corridor lens narrows the beam pattern from the standard 140° spread to a longer, narrower throw suitable for hallway and corridor applications where light needs to travel further along the length of the space rather than spreading wide.

    Shipping & Returns

    Free worldwide delivery

    Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

    Returns

    30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.