Commercial · Linear

Direct-Indirect low glare Linear Lighting

Direct/Indirect Linear

28W to 145W
3,248lm to 16,820lm
116lm/W
IP20
5 Years warranty

Order code BLA2-42B-840-PR-DI-D1-SM-BL

4,872 lm

CRI>80, 4000K. MICROPRISMATIC DIFFUSER optic. BL Black (RAL 9005).

Measured file PR036-42B-840-PR-DI (taken as BLA2-42B-840-PR-DI, to confirm): 5,087 lm at 43.7 W (116.4 lm/W).

42W nominal. 1,430 × 73 × 85 mm. CE, RoHS.

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116 lm/W

The Blackwell 2 Series Direct-Indirect UGR<19 is a premium commercial linear LED luminaire engineered to provide low glare, LG7-compliant lighting with enhanced visual comfort.

Its dual light-emitting surfaces deliver downward illumination for functional lighting, while the upward-facing surface softly illuminates the ceiling to reduce contrast and further minimise glare.

Manufactured from extruded aluminium with a refined 73mm x 85mm profile, it is designed exclusively for suspended installation, providing a clean, architectural aesthetic.

With DALI-2 dimming, tuneable white (2700K-5700K), and standard or custom lengths, the Blackwell Direct-Indirect adapts to a wide range of specification-grade interior projects.

Performance summary
Series code	BLA2
Lengths	A 1,150mm to G 2,970mm, five powers in each length
Nominal power	28W to 145W
Efficacy	116lm/W @ CRI>80, 4000K CCT (micro-prism)
Lumen output	3,248lm to 16,820lm
Lumen maintenance	L70B10 ≥75,000 hours
Certification	CE, RoHS
Warranty	5 Years

Sheet lumen at CRI>80, 4000K, with no modification: 28A 3,248 lm, 35A 4,060 lm, 42A 4,872 lm, 50A 5,800 lm, 56A 6,496 lm, 35B 4,060 lm, 42B 4,872 lm, 50B 5,800 lm, 60B 6,960 lm, 70B 8,120 lm, 42C 4,872 lm, 52C 6,032 lm, 62C 7,192 lm, 72C 8,352 lm, 84C 9,744 lm, 48D 5,568 lm, 60D 6,960 lm, 72D 8,352 lm, 85D 9,860 lm, 98D 11,368 lm, 56E 6,496 lm, 70E 8,120 lm, 82E 9,512 lm, 98E 11,368 lm, 110E 12,760 lm, 62F 7,192 lm, 78F 9,048 lm, 94F 10,904 lm, 110F 12,760 lm, 125F 14,500 lm, 72G 8,352 lm, 90G 10,440 lm, 108G 12,528 lm, 126G 14,616 lm, 145G 16,820 lm. Another CRI, or a modification, still prints the order code and leaves the lumen blank. 65 measured files give 116.4 to 125.6 lm/W; the measured figure for the chosen optic shows under the code.

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Blackwell 2 Series data sheet

Blackwell 2 Series photometrics

Questions for Adam list what the sheet and the measured files do not settle yet.

LIGHT DISTRIBUTION OPTIONS

PR

Polar

Isolux

MICROPRISMATIC DIFFUSER

Asymmetric

Microprism

Measured, PR036-108G-840-PR-DI (taken as BLA2-108G-840-PR-DI, to confirm)

OP

Polar

Isolux

OPAL DIFFUSER

Asymmetric

Microprism

Measured, PR036-108G-840-OP-DI (taken as BLA2-108G-840-OP-DI, to confirm)

Polar: solid green C0–C180, dashed blue C90–C270, dotted amber the plane through the brightest direction when it lies between them; rings at 25% steps of the peak. Isolux: the footprint on the floor with the fitting aimed straight down, contours at 50%, 25% and 10% of the brightest point, grid in mounting heights (H). Both are drawn from the first measured file for that optic.

DESIGN FEATURES

Direct-indirect lights designed for purpose

Dual light-emitting surfaces balance direct and indirect illumination to reduce glare and improve visual comfort. Upward light softly illuminates ceilings, minimising contrast and enhancing overall ambience. Suspended mounting only, ensuring optimal distribution and uniformity in open-plan or high-ceiling spaces. Micro-prismatic diffuser achieves UGR<19, supporting LG7 compliance in commercial and educational applications. DALI-2, DSI, 1-10V, and switch dimming options allow seamless integration with modern lighting control systems. Standard and bespoke lengths provide continuous, tailored lines of light for architectural continuity. Choice of finishes and flex colours ensures the luminaire complements interior schemes. Emergency lighting options, including 3-hour and DALI self-test, maintain compliance with building regulations.

TYPICAL APPLICATIONS

Offices

We offer a selection of office lighting, LED Office Lighting includes a choice of LED ceiling lights, ceiling panel lights, linear fittings and downlights.

Airport Aprons

We supply specialist lighting for airport aprons which meets or exceeds all CAA airport apron lighting standards including lux levels, glare and ULR.

Education

For schools, colleges and universities, we offer a vast range of efficient LED classroom lighting solutions that will deliver long term cost savings.

Retail

Based in the UK, with global distribution, we offer a superb choice of stylish and efficient LED lights for shops, shopping malls and shopping centres.

Supermarket

For shops, supermarkets and shopping malls, we offer energy efficient LED lighting solutions for sales floors that minimise energy consumption.

Meeting Rooms
Corridors
Receptions
Changing Rooms

GALLERY

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SPECIFICATIONS

Light source
Light Emmission CCT	Direct & Indirect
CRI	≥80
SDCM	<3
Diffusers	Micro-prism (PR, UGR<19) or opal (OP)
Typical UGR	<19

Electrical
System Power Factor	>0.9
Input Voltage	220-240VAC
Input Frequency	50-60Hz
Insulation Class	Class I

Environmental
IP Rating	IP20

Physical/Mechanical
Product Dimensions: LxWxH (mm)	1,150 to 2,970 (by length code) x 73 x 85

Dimming/Controls
Dimming Options	1-10V, DALI

Options/Accessories
Mounting Styles	Surface mounted, cable suspended

Options/Accessories
Mounting Styles	Surface mounted, cable suspended
Available Product Colours	White (RAL 9016M), Black (RAL 9005), Silver (RAL 9006), custom

Each body (size and weight exclude bracketry)
28A	28W nominal. 1,150 × 73 × 85 mm. CE, RoHS.
35A	35W nominal. 1,150 × 73 × 85 mm. CE, RoHS.
42A	42W nominal. 1,150 × 73 × 85 mm. CE, RoHS.
50A	50W nominal. 1,150 × 73 × 85 mm. CE, RoHS.
56A	56W nominal. 1,150 × 73 × 85 mm. CE, RoHS.
35B	35W nominal. 1,430 × 73 × 85 mm. CE, RoHS.
42B	42W nominal. 1,430 × 73 × 85 mm. CE, RoHS.
50B	50W nominal. 1,430 × 73 × 85 mm. CE, RoHS.
60B	60W nominal. 1,430 × 73 × 85 mm. CE, RoHS.
70B	70W nominal. 1,430 × 73 × 85 mm. CE, RoHS.
42C	42W nominal. 1,710 × 73 × 85 mm. CE, RoHS.
52C	52W nominal. 1,710 × 73 × 85 mm. CE, RoHS.
62C	62W nominal. 1,710 × 73 × 85 mm. CE, RoHS.
72C	72W nominal. 1,710 × 73 × 85 mm. CE, RoHS.
84C	84W nominal. 1,710 × 73 × 85 mm. CE, RoHS.
48D	48W nominal. 1,990 × 73 × 85 mm. CE, RoHS.
60D	60W nominal. 1,990 × 73 × 85 mm. CE, RoHS.
72D	72W nominal. 1,990 × 73 × 85 mm. CE, RoHS.
85D	85W nominal. 1,990 × 73 × 85 mm. CE, RoHS.
98D	98W nominal. 1,990 × 73 × 85 mm. CE, RoHS.
56E	56W nominal. 2,270 × 73 × 85 mm. CE, RoHS.
70E	70W nominal. 2,270 × 73 × 85 mm. CE, RoHS.
82E	82W nominal. 2,270 × 73 × 85 mm. CE, RoHS.
98E	98W nominal. 2,270 × 73 × 85 mm. CE, RoHS.
110E	110W nominal. 2,270 × 73 × 85 mm. CE, RoHS.
62F	62W nominal. 2,550 × 73 × 85 mm. CE, RoHS.
78F	78W nominal. 2,550 × 73 × 85 mm. CE, RoHS.
94F	94W nominal. 2,550 × 73 × 85 mm. CE, RoHS.
110F	110W nominal. 2,550 × 73 × 85 mm. CE, RoHS.
125F	125W nominal. 2,550 × 73 × 85 mm. CE, RoHS.
72G	72W nominal. 2,970 × 73 × 85 mm. CE, RoHS.
90G	90W nominal. 2,970 × 73 × 85 mm. CE, RoHS.
108G	108W nominal. 2,970 × 73 × 85 mm. CE, RoHS.
126G	126W nominal. 2,970 × 73 × 85 mm. CE, RoHS.
145G	145W nominal. 2,970 × 73 × 85 mm. CE, RoHS.

The power code is the watts and the length letter: 42B is 42W in the 1,430mm length.

Lumen figures are the sheet's efficacy for the length multiplied by the power, for the micro-prism diffuser; they match both ends of each length's printed range.

Electrical parameters are for D1 drivers unless otherwise stated.

If more than one modification is required, separate each modification with a hyphen at the end of the product code.

Select a compatible driver for occupancy sensors with dimming.