Energy & codes · 3 September 2026 · 2 min read
Lighting power density: designing for energy codes
Green building codes across India and the Gulf cap how much power lighting may use. Meeting the limit is easy; meeting it while keeping the design intent takes planning.
Lighting power density (LPD) is the installed lighting load divided by the floor area, expressed in watts per square metre. Energy codes set maximum LPD allowances by space type — ASHRAE 90.1 internationally, the Energy Conservation Building Code (ECBC) in India, and regulations and rating systems such as Dubai's Al Sa'fat and Abu Dhabi's Estidama in the UAE.
Why it matters
LPD calculations are often a condition of permits and green-building certification, and they are checked against the fixture schedule. A late swap to a less efficient luminaire can push a space over its limit.
Meeting the limit without losing the design
- Light surfaces and tasks rather than flooding whole floor areas.
- Choose efficient optics: a luminaire that puts light where it is needed needs fewer watts.
- Use controls — occupancy, daylight dimming and scheduling — which many codes recognise with additional credits.
- Track LPD from concept stage, not as a final check, so the budget is never a surprise.
Every FASADO lighting package includes LPD calculations alongside lux levels and fixture schedules, so compliance is designed in rather than retrofitted.
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