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Lumi 600x600mm CCT LED Panel Light 30W - White

£3999
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Lumi is a 600x600mm recessed LED panel light with selectable colour temperature (CCT), allowing the installer to choose between 3000K warm white, 4000K neutral white or 5700K daylight at the point of installation. The backlit design delivers up to 4,100 lumens at 4000K from a 30W LED array housed behind a prismatic diffuser rated UGR19 for glare control in office and classroom environments.

Designed as a direct retrofit for aging T8 and T5 fluorescent modular fittings in commercial buildings, schools, offices and healthcare ancillary spaces, the panel fits standard 600x600mm suspended ceiling grids with either 15mm or 25mm profiles. The white aluminium frame sits 9mm below the grid surface once installed, with the diffuser presenting a flat, flush-mounted appearance from below. The panel is 0-10V dimmable, requiring a compatible 0-10V dimmer control to adjust light output.

The aluminium construction and Class II double-insulated rating mean no earth connection is required during installation. At 25mm depth the panel fits shallow ceiling voids where older luminaires may have required deeper cavities. The prismatic diffuser spreads light across a 90-degree beam angle, providing even distribution across workspaces without hot spots. Efficacy ranges from 123lm/W at 3000K to 134lm/W at 4000K, meeting modern commercial lighting efficiency requirements. Rated L70B50 at 50,000 hours, the panel is expected to retain 70% of initial output after approximately 11 years of continuous operation.

Knightsbridge offers separate accessory kits for surface mounting, suspension below exposed ceilings, recessed clips for plasterboard ceilings, and a 3-hour emergency battery module for compliance installations requiring maintained or non-maintained emergency lighting.

Specification
Length 595 mm
Height 25 mm
Width 595 mm
Projection 9 mm
Construction Aluminium
Finish White
Class II
IP Rating IP40
Primary Voltage 230V 50Hz
Diffuser Prismatic
Lamp Technology LED
Dimmable 0-10V dimming only
L70B50 50000
Energy Rating (Class) post 2021 SLR D
Beam Angle 90
CCT 3000/4000/5700 K
Light Colour CCT
Lumens 3940/4100/3945 lm
Lumens (Light Source only) 4530/4800/4800 lm
Wattage 30
Efficacy 123/134/124 lm/W
CRI >85
Warranty 5
Downloads

Product Specification Sheet

Frequently Asked

What does CCT mean and how is it selected?

CCT stands for correlated colour temperature. This panel has three settings: 3000K (warm white), 4000K (neutral white), and 5700K (daylight). The installer selects the required colour temperature via a switch on the driver before final installation. Once set, the colour temperature is fixed until the panel is reopened and adjusted.

What ceiling grid profiles does it fit?

The Lumi fits standard 600x600mm suspended ceiling grids with either 15mm or 25mm T-bar profiles. The panel frame rests on the grid with a 9mm projection below the ceiling surface. For plasterboard or solid ceilings, separate recessed mounting clips are available from Knightsbridge.

Is it compatible with standard dimmer switches?

No. The panel requires a 0-10V dimmer control system, which is different from standard trailing-edge or leading-edge domestic dimmers. If no 0-10V dimmer is wired, the panel operates at full output. Attempting to use a standard household dimmer will not work and may damage the driver.

What is the UGR19 rating?

UGR (Unified Glare Rating) measures discomfort glare from a luminaire. UGR19 is the maximum permitted rating for most office and classroom environments under building regulations. The Lumi's prismatic diffuser achieves UGR19 by diffusing the LED array evenly without bright spots that cause eye strain during prolonged use.

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 Lumi is a 600x600mm recessed LED panel light with selectable colour temperature (CCT), allowing the installer to choose between 3000K warm white, 4000K neutral white or 5700K daylight at the point of installation. The backlit design delivers up to 4,100 lumens at 4000K from a 30W LED array housed behind a prismatic diffuser rated UGR19 for glare control in office and classroom environments.

    Designed as a direct retrofit for aging T8 and T5 fluorescent modular fittings in commercial buildings, schools, offices and healthcare ancillary spaces, the panel fits standard 600x600mm suspended ceiling grids with either 15mm or 25mm profiles. The white aluminium frame sits 9mm below the grid surface once installed, with the diffuser presenting a flat, flush-mounted appearance from below. The panel is 0-10V dimmable, requiring a compatible 0-10V dimmer control to adjust light output.

    The aluminium construction and Class II double-insulated rating mean no earth connection is required during installation. At 25mm depth the panel fits shallow ceiling voids where older luminaires may have required deeper cavities. The prismatic diffuser spreads light across a 90-degree beam angle, providing even distribution across workspaces without hot spots. Efficacy ranges from 123lm/W at 3000K to 134lm/W at 4000K, meeting modern commercial lighting efficiency requirements. Rated L70B50 at 50,000 hours, the panel is expected to retain 70% of initial output after approximately 11 years of continuous operation.

    Knightsbridge offers separate accessory kits for surface mounting, suspension below exposed ceilings, recessed clips for plasterboard ceilings, and a 3-hour emergency battery module for compliance installations requiring maintained or non-maintained emergency lighting.

    Specification
    Length 595 mm
    Height 25 mm
    Width 595 mm
    Projection 9 mm
    Construction Aluminium
    Finish White
    Class II
    IP Rating IP40
    Primary Voltage 230V 50Hz
    Diffuser Prismatic
    Lamp Technology LED
    Dimmable 0-10V dimming only
    L70B50 50000
    Energy Rating (Class) post 2021 SLR D
    Beam Angle 90
    CCT 3000/4000/5700 K
    Light Colour CCT
    Lumens 3940/4100/3945 lm
    Lumens (Light Source only) 4530/4800/4800 lm
    Wattage 30
    Efficacy 123/134/124 lm/W
    CRI >85
    Warranty 5
    Downloads

    Product Specification Sheet

    Frequently Asked

    What does CCT mean and how is it selected?

    CCT stands for correlated colour temperature. This panel has three settings: 3000K (warm white), 4000K (neutral white), and 5700K (daylight). The installer selects the required colour temperature via a switch on the driver before final installation. Once set, the colour temperature is fixed until the panel is reopened and adjusted.

    What ceiling grid profiles does it fit?

    The Lumi fits standard 600x600mm suspended ceiling grids with either 15mm or 25mm T-bar profiles. The panel frame rests on the grid with a 9mm projection below the ceiling surface. For plasterboard or solid ceilings, separate recessed mounting clips are available from Knightsbridge.

    Is it compatible with standard dimmer switches?

    No. The panel requires a 0-10V dimmer control system, which is different from standard trailing-edge or leading-edge domestic dimmers. If no 0-10V dimmer is wired, the panel operates at full output. Attempting to use a standard household dimmer will not work and may damage the driver.

    What is the UGR19 rating?

    UGR (Unified Glare Rating) measures discomfort glare from a luminaire. UGR19 is the maximum permitted rating for most office and classroom environments under building regulations. The Lumi's prismatic diffuser achieves UGR19 by diffusing the LED array evenly without bright spots that cause eye strain during prolonged use.

    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.