LIGHTING
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Retrofitting classroom lighting: why upgrades are more complex than they appear C lassroom lighting upgrades are often seen as simple maintenance—just swapping old fluorescent fittings luminaires often have integrated, non- replaceable components that must be replaced entirely if they fail. For facilities
This can create a disconnect between design intent and on-site reality. Success depends on early technical assessments and a realistic consideration of infrastructure limits before procurement.
just technology upgrades. They’re infrastructure projects at the intersection of engineering compliance, legacy constraints, procurement realities, and maintenance strategies. Success requires more than selecting efficient luminaires. It demands an understanding of operations, infrastructure constraints, and practical realities in public- sector facilities.
with tight budgets, this affects lifecycle costs. Maintenance teams often prefer simple like- for-like replacements to reduce the risk of disruption.
for modern LEDs. In reality, retrofitting is a complex engineering challenge shaped by ageing infrastructure, compliance requirements, procurement limits, and maintenance needs. Success in public-sector lighting upgrades depends not only on luminaire performance but also on how well solutions fit existing constraints. These projects highlight the need to balance technical compliance, practical implementation and long- term sustainability within educational infrastructure. Working within existing infrastructure A major challenge is the condition and configuration of older building infrastructure. Many older schools were designed for fluorescent systems in shallow ceilings, leaving little room for modification, especially with surface-mounted fittings and ageing wiring. Existing installations often dictate replacement choices more than modern design preferences. Mounting points, wiring access, and restricted ceilings determine which luminaires can be installed without major alterations. Compliance is more than wattage replacement It’s a misconception that simply replacing fluorescent lamps with LEDs ensures compliance. LEDs are more efficient, but compliance with standards such as SANS 10114-1 also depends on illuminance, uniformity, and glare control. Differences in beam distribution, lumen output, and luminaire spacing can significantly affect classroom usability and occupants’ comfort. standardisation. Facilities try to minimise spare-part variations, simplify maintenance, and reduce stock by standardising luminaires across sites. But what’s ideal for new builds isn’t always suitable for retrofits. This requires balancing compatibility with existing infrastructure, practicality of maintenance, and future-focused design. Product availability still shapes design decisions Product availability and supply chain issues also shape engineering decisions. Many luminaires in older facilities are no longer made, and direct replacements are scarce. Even modern alternatives can Balancing standardisation and practicality Public sector projects emphasise complicate installation due to size or mounting differences. Projects may use adaptable luminaires that work with both LED and fluorescent tech. This aids flexibility and maintenance, reflecting the transition from fluorescent to LED systems. Procurement and site constraints Public sector procurement adds further complexity. Specifications are often set before site conditions are fully understood. After tenders, there’s little flexibility to adapt specifications to unexpected installation issues.
Maintenance and lifecycle considerations LEDs last longer and save energy, but maintenance remains crucial. Modern
More than a lighting upgrade Classroom lighting retrofits aren’t
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SPARKS ELECTRICAL NEWS
JUNE 2026
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