Managing lighting of common areas

Why common area lighting consumption adds up

Lights in shared areas often stay on for the whole day, or far longer than necessary, because mechanical timers installed decades ago do not adjust to the actual seasonal hours of darkness, and because time switches in corridors get held down out of convenience. The result is an electricity bill that grows year after year with no obvious explanation, until someone actually compares line items in the financial statement.

Before any technical intervention, the first step is understanding where the energy goes: how many light points exist, what wattage the installed bulbs have, and how many hours a day they stay lit across stairwells, entrance halls, courtyards, garages and technical rooms. Even a simple survey, done together with the property manager, makes it possible to estimate expected savings before calling the assembly and to target the intervention where consumption is highest.

Switching to LED: savings and assembly requirements

Replacing traditional bulbs with LEDs is the intervention with the most favorable cost to benefit ratio: LED fixtures use noticeably less energy for the same light output and last considerably longer, which also reduces how often maintenance is needed. From an assembly standpoint, replacing light fixtures in common areas generally falls under ordinary administration if it does not involve substantial changes to the electrical system, so it passes with the ordinary majority set out in article 1136 of the Italian Civil Code.

Things change if the work also includes rebuilding the electrical system or installing new dedicated panels and lines: in that case it becomes a proper innovation and requires the qualified majority set for innovations by article 1120 of the Italian Civil Code. Before bringing the item to the assembly, it is worth asking the installer's quote to clearly state whether the work is a simple bulb replacement or a system upgrade, so the assembly can be called with the correct quorum from the start.

Presence and daylight sensors: automating switching

Presence (or motion) sensors and daylight sensors remove the human variable from the equation: the light turns on only when needed, for just long enough to walk through, and stays off during daylight hours regardless of how often people forget to switch it off. In buildings with many light points, installation can be phased, starting with the busiest areas such as entrance halls and main stairwells.

One point worth discussing with the installer is timing: a timer set too short leaves residents in the dark halfway up the stairs and generates complaints, while one set too long wastes part of the savings. It is also worth checking that the sensors are compatible with any existing video surveillance system in the common areas, to avoid interference between the two systems.

Allocating costs across owners

The cost of electricity for common area lighting is normally allocated according to the general ownership shares, unless the contractual condominium bylaws state otherwise, or in special cases such as lighting for a stairwell serving only some owners, which is allocated only among those who actually benefit from it under article 1123, second paragraph, of the Italian Civil Code.

The cost of the bulb replacement or sensor installation itself follows the same allocation criterion as ordinary consumption, while rebuilding the electrical system may require a dedicated allocation table if it only affects part of the building. Tracking the lighting line item separately in the accounts, distinguishing ordinary consumption from extraordinary modernization costs, helps the property manager present a clear financial statement and answer owners' questions precisely during the assembly.

Scheduled maintenance of the system

Even an LED system needs maintenance: periodic cleaning of the fixtures, checking the sensors, inspecting the electrical panels, and replacing failed bulbs promptly, since a light left dark for too long pushes residents to switch on nearby lights manually, undoing the savings gained from automation.

Scheduling periodic checks, ideally alongside other mandatory inspections such as the condominium's electrical system check, helps catch faults before they become a problem residents complain about. A platform like AmministraPro lets the property manager log maintenance deadlines, attach installer quotes, and keep a history of consumption data, so there are always numbers on hand to compare results before and after the intervention and present them clearly at the assembly.

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