In the world of interior design, light is more than illumination – it’s atmosphere, function, and emotion woven into a space, writes the Illumination Engineering Society of South Africa (IESSA). Yet, while aesthetics often take centre stage, the technical precision of lighting is just as vital.
At the intersection of design and compliance lies a powerful opportunity: to elevate spaces with lighting solutions that are not only beautiful but also safe, efficient, and standards-driven.
This article explores key elements of interior lighting design every interior designer should consider — from the necessity of emergency lighting to managing glare and applying SANS-compliant lighting calculations.
Emergency lighting: More than a regulatory box-tick
Emergency lighting isn’t just about compliance, it’s about responsibility. When the power fails, or evacuation is necessary, well-designed emergency lighting systems save lives. Interior designers must understand where emergency lights are required, how they impact the overall visual flow, and how to integrate them discreetly yet effectively into a space.
South African building regulations and the SANS 10114-2 standard define the requirements for emergency and escape route lighting. Collaborating early with lighting specialists ensures that these systems are integrated seamlessly without compromising the interior’s aesthetic.
Industrial lighting in interior design contexts
As industrial-style interiors continue to trend, designers are increasingly working with industrial-grade lighting or repurposing fixtures for commercial, hospitality, and even residential settings.
However, true industrial lighting goes beyond looks; it's engineered for durability, output, and safety in challenging environments. Designers should consider whether the light levels and thermal performance of these fixtures suit their setting and work with manufacturers or lighting professionals to balance form and function.
Glare: the unseen saboteur of good design
Glare can silently ruin the experience of a space, causing discomfort, reducing productivity, and even impacting health. Whether it’s direct glare from a fixture or reflected glare off a surface, interior designers must address glare during the lighting design phase.
The SANS 10114 series and the Unified Glare Rating (UGR) system provide guidelines on acceptable glare levels, especially in offices, schools, and healthcare environments. Carefully choosing luminaire placement, shielding, and surface materials can help mitigate glare while preserving the intended ambience.
Lighting calculations: where art meets science
Lighting calculations are essential for ensuring adequate and uniform light distribution across a space. These calculations help determine:
- Lux levels required for different tasks (e.g., 300–500 lux for offices)
- Luminaire placement
- Power consumption and efficiency
- Compliance with SANS lighting standards
While many designers work with lighting consultants for detailed calculations, a basic understanding allows interior designers to assess lighting layouts more critically and contribute meaningfully to the specification process.
SANS interior lighting standards: a baseline for excellence
South Africa’s SANS 10114-1 standard is the benchmark for interior lighting design. It outlines minimum requirements for illuminance levels, uniformity, glare control, and lighting quality across various building types.
For interior designers, awareness of these standards helps ensure that design concepts are both visionary and viable. It empowers you to select lighting solutions that meet performance criteria while aligning with design intent.
Elevate for success with IESSA’s online interior lighting course
As spaces become more multi-functional and user-centric, the integration of lighting design into early project phases is more critical than ever. Interior designers are uniquely positioned to lead this collaboration, blending spatial awareness, human experience, and technical insight.
Don't miss this opportunity to enhance your understanding and elevate your position in the lighting industry. Register today and take a step toward creating spaces that are not only stunning but also smart, safe and sustainable.
**For more details and registration, see IESSA’s course schedule: here
