ALKAN® · Indoor & Office Lighting
Riva 55 Slim
38–55 W · 3,420–4,550 lm · IP40
Why this luminaire
Riva 55 Slim: comfortable light for interiors
Riva 55 Slim is an ALKAN® interior luminaire. It is designed for offices, schools, shops and public buildings, where visual comfort matters as much as efficiency. We design to EN 12464-1 in DIALux evo, so every room gets the light its tasks require.
Built for the job
Aluminium draws heat away from the LEDs, which protects light output and lifetime.
The diffuser turns the LED points into an even, softer light surface.
For dry interiors: protected against solid objects larger than 1 mm (EN 60529).
The operating range.
Mains supply.
LED lifetime.
Colour rendering index.
Where it fits
Workstations, meeting rooms and corridors.
Classrooms, laboratories and clinics.
Shops, showrooms, lobbies and public buildings.
Lighting design criteria
EN 12464-1 sets the minimum average illuminance on the task area for each type of work or room.
An upper limit for discomfort glare from the luminaires, set per task.
Minimum uniformity across the task area and a minimum colour rendering index for each task.
Engineering notes
Mounting options vary by model. The layout follows the EN 12464-1 calculation for each room.
Optics and beam angles are defined per variant. We compare them in DIALux evo with your geometry and pick the one that reaches the target with the fewest luminaires.
No dimming interface is specified for this luminaire. If your project needs one, we check the options with the manufacturer before we quote.
Install and connect following the instructions supplied with the luminaire. Clean the cover periodically to keep the designed light levels; the calculation already includes a maintenance factor.
Certification and standards
CE: the manufacturer’s EC declaration of conformity under Low Voltage Directive 2014/35/EU (January 2025) names the AKBAL series.
The LED driver is ENEC-certified. The luminaire itself has no ENEC licence of its own.
Coverage is stated as published by ALKAN®. Certificate copies come with every offer.
Datasheets for every variant are in the variants table on this page; LDT/IES photometric files are available on request.
Questions we hear
Can it replace my existing luminaires?
In most retrofit projects, yes. We check the existing mounting points and the target values in a calculation before we quote, so you know the result in advance.
What tolerances apply to these values?
Tolerances: power +5%, luminous flux −10%, efficacy −5%. Our calculations take this into account.
Plan your project with Riva 55 Slim
Send us drawings, photos or a few measurements of the site. You get a DIALux layout, the quantities and an offer from the official ALKAN® distributor.
Request a DIALux calculationTechnical specifications
| Power | 38–55 W |
|---|---|
| Luminous flux | 3,420–4,550 lm |
| Efficacy | 90 lm/W |
| Colour temperature | 4000 K |
| Colour rendering | Ra>80 |
| Ingress protection | IP40 |
| Ambient temperature | −20 °C to +45 °C |
| Supply | 220–240 VAC 50/60 Hz |
| Driver | ENEC-certified, protected against voltage surges |
| LED lifetime | 60,000 h |
| Housing | Extruded aluminium |
| Cover / optic | Polycarbonate diffuser |
| Finish | electrostatic powder coating, RAL 9016 |
| Certificates | CE declarationENEC-certified driver |
| Product code | Version | Power | Luminous flux | Efficacy | W × L × H | Weight | Datasheet (PDF) |
|---|---|---|---|---|---|---|---|
| 53.AKBAL 064SOC | 38 W | 3,420 lm | 90 lm/W | 55 × 1000 × 88 mm | 1.40 kg | ||
| 53.AKBAL 067SOC | 48 W | 4,320 lm | 90 lm/W | 55 × 1250 × 88 mm | 1.80 kg | ||
| 53.AKBAL 065SOC | 55 W | 4,550 lm | 90 lm/W | 55 × 1500 × 88 mm | 2.16 kg |
Tolerances: power +5%, luminous flux −10%, efficacy −5%.
Slim linear luminaire for surface or pendant mounting, with an extruded aluminium body and a UV-resistant opal PMMA diffuser, manufactured to EN 60400. Dedicated connectors join units into continuous lines of light. The European-made constant-current driver provides thermal protection and surge protection. Corridor function and an emergency kit are available as options.
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