Lighting for Underground &
Multi-Storey Parking Facilities
A comprehensive technical guide to the design, installation
and optimization of LED lighting in parking structures —
from standards and lux levels to automation systems,
cost analysis and real-world case studies.
≤75%
Energy savings with LED
100.000h
LED lifespan
EN 12464-1
European reference standard
<18 months
Typical payback period
CRI ≥80
LED colour rendering
IP66
TECHLUMEN fixture protection
01 — Lighting Technologies
Light Source Technologies
for Parking Facilities
Choosing the right lighting technology is critical for performance, safety and economy
in parking facilities. While fluorescent and HID (high-intensity discharge) lamps were
traditionally used, LEDs now dominate as the optimal solution across every criterion.
Technology
Efficacy (lm/W)
Lifespan
CRI
Start-up
Dimming
LED
120–200
50–100K h
80–90+
Instant
Full
Fluorescent
60–100
10–30K h
70–85
1–5 sec
Limited
Metal Halide (MH)
80–100
10–15K h
60–90
1–5 min
Difficult
HPS (Sodium)
100–140
20–24K h
20–30
3–10 min
Difficult
Detailed technology comparison
LEDs produce far more light per Watt — a modern LED fixture achieves >120 lm/W,
compared to ~80 lm/W for fluorescent and 40–90 lm/W for HID. This means a 30W LED fixture can
replace a 100W HID with comparable output. The ~70% energy saving is immediately visible on the electricity bill.
Beyond lumens, LEDs utilise light more effectively: superior directionality
(less wasted light towards the ceiling), high CRI for improved visibility, and white light
perceived as brighter than the yellow/orange of sodium lamps (scotopic/photopic effect).
Even at lower lumen output, spaces appear brighter with LED than with HPS.
Losses in drive systems also matter: modern LED drivers achieve
90–95% efficiency, while many magnetic HID ballasts waste 15%+ as heat.
HID general: Cannot dim, incompatible with automation
HID general: 15%+ losses in magnetic ballasts
EU: T5/T8 fluorescent tubes banned since Aug. 2023 (RoHS/EcoDesign)
Retrofit tubes vs complete fixture replacement
In practice, many parking facility managers opt for the cheaper solution: replacing only
the fluorescent tubes with LED retrofit tubes (T8/T5 LED), while keeping
the old fixture housing. Although this reduces upfront cost, it creates serious
problems in the medium term.
⚠ The problem: LED retrofit tubes
Short lifespan: Retrofit LED tubes typically last 15,000–30,000 hours — far below the 50,000–100,000 of an integrated LED luminaire
Thermal issues: Old housings were not designed for LED thermal management — poor cooling = faster chip degradation
Ballast incompatibility: Many retrofit tubes require ballast bypass or removal — if done incorrectly, risk of short circuit or fire
Lower efficacy: Retrofit tubes ~100 lm/W, integrated LED fixtures >130 lm/W — significant difference across large numbers of fixtures
No dimming/automation: Most retrofit tubes don't support DALI or 0-10V — impossible to integrate with control systems
Questionable warranty: Installing LED tubes in housings designed for fluorescent may void warranties and CE certifications
✓ The solution: Complete fixture replacement
Much longer lifespan: 50,000–100,000 hours — effectively zero replacements for 10–15 years under typical parking operation
Integrated thermal management: Aluminium housing designed for LED — proper cooling, long life, consistent performance
Full compatibility: DALI-ready, dimming, integrated occupancy sensors — leveraging all LED advantages
Higher efficacy: >130 lm/W system efficacy — fewer Watts for the same or more lux
Regulatory compliance: CE certified, IP65, IK08+ — fully meets EN 12464-1 and electrical installation codes
Uniform illumination: Modern optics (prismatic, asymmetric) ensure uniformity without dark zones — e.g. VELISTI-T with 7 beam angle options
Real-world experience — The "dead lamp" problem: In large parking facilities with
dozens or hundreds of fixtures, retrofit LED tubes fail asynchronously: after 1–2 years,
many fixtures operate with only one tube working or none at all. Each replacement requires
an elevated work platform, an electrician, and partial area closure. In a parking facility
with 200 fixtures, the replacement cycle never ends — by the time you replace the last batch,
the first ones have already failed again. The result: permanent under-illumination, user complaints,
safety concerns and ultimately higher total cost than full fixture replacement
from the outset. Investing in integrated LED luminaires eliminates this vicious cycle entirely.
TECHLUMEN solutions for parking: The
VELISTI-T series (IP66, anodised aluminium, up to 176 lm/W, L80B10 >80,000h,
7 beam angle options, DALI/1-10V/Emergency 3h, 5+3 year warranty) is the premium
fluorescent replacement solution for parking facilities — snap-fit installation,
manufactured in Greece. For cost-effective applications, the
INDUS series (IP66, IK08, 132 lm/W, L80B10 >50,000h, 5-year warranty)
delivers reliable lighting at competitive cost.
Note: Low-pressure sodium (LPS) lamps are rarely used in parking —
they have extremely low CRI (~0) and are limited to specialised road lighting.
Metal halides produce "bright" white light but degrade rapidly,
while HPS have minimal depreciation but emit orange light with low CRI.
LEDs combine both: bright white light with minimal lumen depreciation.
The LED Transition — Inevitable: By 2035, the majority of
lighting installations worldwide are expected to be LED. The EU banned
T5/T8 linear fluorescent tubes from Aug. 2023 (RoHS & EcoDesign Directives).
Adopting LED is now both an economic and regulatory imperative.
02 — Illumination Levels
Lux Requirements, Uniformity
& Lighting Zones
Lighting standards define minimum lux levels, uniformity,
glare control and colour rendering for each zone within a parking facility.
The primary design reference is EN 12464-1:2021 (indoor workplaces)
and DIN EN 12464-2 (outdoor areas).
Floor Plan — Lighting Zones per EN 12464-1
ENTRANCE/EXIT
300
lux (daytime)
75
lux (night)
RAMP
150–300
lux (transition)
TRAFFIC LANE
150
lux — U₀ ≥ 0,40 — UGR ≤ 25
STAIRS &
ELEVATORS
150
lux — U₀ ≥ 0,40
EMERGENCY
EXIT
≥ 1
lux (EN 1838)
LED Fixture
Entrance zone (300/75 lux)
Pedestrian zone (150 lux)
Emergency (≥1 lux) Traffic lane
Zone
Lux (avg)
U₀ (min/avg)
UGR
CRI
Notes
Main areas & traffic lanes
150lux
≥ 0,40
≤ 25
≥ 60
Primary vehicle & pedestrian circulation zone
Entrance / Exit (daytime)
300lux
≥ 0,40
≤ 25
≥ 60
Eye adaptation — preventing "black hole effect"
Entrance / Exit (night)
75lux
≥ 0,40
≤ 25
≥ 60
Lower — no contrast with daylight needed
Ramps & bends
150–300lux
≥ 0,40
≤ 22
≥ 60
Critical areas — higher levels near entrances
Stairs & elevators
150lux
≥ 0,40
≤ 22
≥ 80
Pedestrian zone — critical for fall prevention
Emergency lighting
≥ 1lux
—
—
—
EN 1838 — autonomy ≥ 1 hour
Glare, colour rendering & vertical illuminance
EN 12464-1 sets maximum glare rating limits of UGR ≤ 22–25 for traffic areas.
Disabling glare can temporarily blind drivers or pedestrians — it is controlled through
louvres, prismatic diffusers and proper mounting height. A colour rendering index of CRI ≥ 60–80
is recommended for adequate recognition of vehicle colours, signage and clothing. The U.S. General Services Administration
CRI of at least 70 is recommended internationally for parking facilities.
Do not overlook vertical illuminance: light on vertical surfaces
(face height) is critical for recognising pedestrians, signage and wayfinding.
Target: at least ¼ to ⅓ of horizontal illuminance on vertical surfaces.
Per DIN EN 12464-2, minimum semi-cylindrical illuminance is 0.4–3 lux for facial recognition.
This increases perceived brightness and eliminates dark corners.
Adapting levels to use: EN 12464-1 specifies minimums of 75–300 lux depending on zone, but the designer should adjust levels according to actual use: lower limits suffice for low-traffic areas (e.g. residential basement parking), while higher levels are appropriate for shopping centres or hospitals. In all cases, uniformity U₀ ≥ 0.40 and glare control UGR ≤ 25 are equally important as absolute lux levels.
KENAK / TOTEE 20701-1: Illumination levels are determined
by EN 12464-1 and must not exceed the minimum values specified —
the designer must not over-design "for safety",
as this contravenes energy conservation principles.
03 — Automation & Controls
Intelligent Lighting
Control Systems
Integrating intelligent control systems dramatically improves both energy
efficiency and safety. The combination of LED + sensors can reduce
energy consumption by 60–80% compared to static HID lighting, and is increasingly
mandated by building energy codes.
60–80%
Consumption reduction
LED + sensors vs HID
76%
Additional savings
from occupancy sensors
20→100%
Standby → full output
on motion detection
Automation technologies
◎
Occupancy / Motion Sensors
PIR (infrared) or microwave detectors. Dim to 20% when vacant,
ramp to 100% on detection. Studies show +76% additional savings beyond LED alone.
Modern fixtures with integrated sensors (bi-level control).
☀
Daylight Harvesting
Photosensors measure ambient light and adjust artificial lighting accordingly.
Fixtures near openings switch off automatically during daylight.
Many sensors combine occupancy + daylight in one unit.
⏱
Time Scheduling
Reduce lighting after midnight to security level,
restore before morning arrival. Seasonal adjustment
(summer/winter schedules). Combined with sensors.
⬡
DALI (Digital Addressable)
Digital protocol — individual addressable control of each fixture.
Dimming, zone grouping, lighting scenes,
fault notification, remote management.
⊞
KNX & BMS
Building-wide automation system integrating lighting,
HVAC and security. Works with DALI gateways.
Central monitoring of entire parking facility.
◐
Dimming (0-10V / DALI)
Smooth luminous flux adjustment. Operate at 50% during low traffic.
LED: full dimming. HID: cannot easily dim —
a critical LED advantage for automation.
Control system architecture
PIR Sensor
Occupancy/Motion
→
Photosensor
Daylight level
→
DALI Controller
Processing & logic
→
LED Driver
Dimming 0–100%
→
LED Fixture
Adjusted output
Adaptive Lighting — Dynamic adjustment
Adaptive lighting combines occupancy sensors + photosensors + time schedules in real time,
ensuring optimal balance between energy and safety. Example: after midnight in an
office building car park, lighting drops to 20% but ramps to 100% on motion detection,
with smooth fade transitions to avoid startling occupants.
Regulatory requirement: In many jurisdictions, occupancy sensors
and daylighting systems are now mandatory in new parking facilities
per building energy codes. Automation extends LED lifespan
(fewer hours at 100%) and helps achieve net-zero targets.
04 — Energy Efficiency & ROI
Cost, Savings &
Return on Investment
Parking lighting often operates 24/7 in basements, hospitals
and shopping centres. System energy efficiency plays a massive role in operating
costs — LEDs reduce both energy consumption and maintenance expenses.
* Sensor savings estimated at ~60% (average parking occupancy).
≤75%
Consumption reduction
LED vs conventional
<18m
Typical payback
period
>60%
Annual return
on investment (ROI)
5×
Longer lifespan
LED vs HID
Energy efficiency factors
Luminous efficacy (lm/W)
LED >120 lm/W, fluorescent ~80 lm/W, HID 40–90 lm/W.
A 30W LED replaces a 100W HID. The saving ~70%
is immediately apparent on the electricity bill.
Qualitative performance
LEDs utilise light better: directionality, high CRI,
scotopic/photopic effect. Drivers 90–95% efficiency
vs 85% magnetic HID ballasts.
W/m²/100 lux indicator
Modern LED parking: <2 W/m²/100 lux (excellent).
Legacy systems: >5 W/m²/100 lux.
Critical metric in building energy audits KENAK.
Life cycle cost (LCC)
LED: 5× lifespan vs HID, minimal replacements,
reduced need for access platforms, less waste.
For 24/7 installations, payback can occur within months.
Calculation example — 10 × MH → LED retrofit
Parameter
HID (MH) 150W
LED 60W
LED 60W + sensors
Power / fixture
150 W
60 W
60 W
Hours / year
8.760
8.760
~3.504 (equivalent)
Consumption / year
13.140 kWh
5.256 kWh
2.102 kWh
Cost @ €0,15/kWh
€1.971
€788
€315
Savings vs HID
—
€1.183 (60%)
€1.656 (84%)
Lamp replacements / year
~0,6 per lamp
~0 (100Kh life)
~0
Rapid payback: In some installations, payback was achieved in
was achieved in <18 months with annual ROI >60%. For 24/7 operations (hospitals, public parking),
the 40–60% savings show from the first utility bill.
With continuously falling LED prices, the cost premium is now minimal.
05 — Standards & Regulations
Regulatory Framework
& Compliance
Parking lighting design must comply with multiple standards at
national, European and international level — covering safety, ergonomics, energy
performance and environmental compliance.
Important: Standards compliance is not merely bureaucratic —
it ensures quality, safety and reduced long-term costs,
while meeting the legal obligations of the owner/operator.
Legacy low-efficiency fixtures may fail to meet
building energy code requirements.
06 — Safety & Installation
Installation Guidelines,
Safety & Maintenance
Installing luminaires in parking facilities requires equipment rated for the environment
(humidity, dust, exhaust fumes, impact), careful design to avoid
glare and shadows, and compliance with electrical installation codes.
CEILING — height 3.0–3.5 m
FLOOR
IP65+ IK08–IK10 ~7.5 m between fixtures
150 lux
150 lux
150 lux
Protection ratings & durability
Parking environments feature humidity, dust, exhaust fumes and potential water
(from vehicles, sprinklers, cleaning). IP65+IP65+ protection is recommended for dust and water jet resistance. Fixtures also face
impact risk from tall vehicles and vandalism — IK08–IK10.
Use metallic housings with polycarbonate or tempered glass covers.
Installation & safety checklist
IP
Ingress protection IP65+ — Dust & water jet resistance. For parking with car washes or sprinkler systems, consider IP66. All switches/panels: minimum IP54. TECHLUMEN VELISTI-T and INDUS series are IP66 rated as standard.
IK
Impact resistance IK08–IK10 — Metallic housings, polycarbonate covers. Low-profile LED panels designed for harsh environments.
⚡
Electrical safety (IEC 60364) — Earthing of metal parts, RCD protection, correct conductor sizing, armoured cabling (conduit/trunking), surge protection on LED drivers.
☢
ATEX (if required) — In areas with fuel vapour risk: explosion-proof fixtures Zone 2. Critical in workshops, fuel pumps, hydrogen/LNG charging. Rare in well-ventilated parking.
◎
Anti-glare design — Louvres, prisms, opaque reflectors. Ceiling-mounted (outside driver's direct line of sight). UGR ≤ 22–25. Avoid deep shadows behind columns.
⊞
Uniform coverage — Grid spacing ~7.5 × 7.5 m at 3.0–3.5 m height. Align with traffic lanes. Additional fixtures near columns. Use Dialux/Relux/AGi32 for design.
Maintenance & access — Provision for mobile ladders/lift platforms. Lock-out/tag-out procedures, PPE (helmet, insulating gloves, non-slip boots). Distribution boards at accessible locations. Periodic fixture cleaning.
📹
CCTV coordination — ≥ 100 lux at camera positions for colour HD footage. Additional fixtures above ANPR cameras at entry/exit points.
SP
Surge protection — SPDs on LED drivers (lightning, grid fluctuations). Critical in underground facilities with significant leakage currents.
Surface finishes & reflectance
Light-coloured walls (~20–30% reflectance) improve lighting uniformity,
while dark ceilings reduce unwanted reflections on windscreens.
Surface colour choices significantly affect perceived brightness
and can reduce the number of fixtures required.
Zoning: Divide into zones (per floor, perimeter vs core,
daylight-adjacent vs deep interior). This enables fine-tuning after installation —
the facility manager can adjust lighting per zone
based on actual usage patterns.
07 — Design & Application
Design, Application
& Practical Guidelines
Theory must translate into practice through proper lighting design.
Here are indicative layout examples and
practical design guidance.
Design example: Underground parking 68 × 35 m
Parameter
Value
Dimensions
~68 m × 35 m (≈2.380 m²)
Ceiling height
~3,2 m (clear)
Number of fixtures
27 × TECHLUMEN VELISTI-T 66 W
Luminous flux / fixture
~5.000 lm
Light distribution
Type V (symmetric diffuse)
Colour temperature
5000 K — CRI 80 (VELISTI-T)
Fixture grid spacing
~7,6 × 7,6 m (25' × 25')
Average horizontal illuminance
~54 lux
Vertical wall illuminance
~36 lux
Power density
~1,08 W/m²
Uniformity
Meets EN 12464-1 (U₀ ≥ 0.40)
Savings vs fluorescent
40–50% lower consumption
TECHLUMEN installation in underground parking facility
TECHLUMEN installation in underground parking facility
With integrated occupancy sensors, the system operates most hours at 50% (standby),
further reducing consumption.
Aligning fixtures with traffic lanes ensures
uniform coverage without dark zones behind columns.
Practical design guidelines
📐 Fixture Layout
Align fixtures with vehicle traffic lanes
Width >15 m: two or more fixture rows
Additional fixtures near columns (shadow avoidance)
Grid ~7.5 × 7.5 m at 3.0–3.5 m mounting height
🚪 Entrance Zone
300 lux daytime in the first 5–10 m
Denser layout or higher-output fixtures
"Daylight fixtures" that only activate during the day
Prevent "black hole effect" at the entrance
💻 Design Software
Dialux, Relux, AGi32 for photometric analysis
Floor plans with isolux contour lines
Vertical illuminance on walls & facial planes
Wiring diagrams & control zone layouts
🔄 Zoning & Flexibility
Each floor = independent control zone
Perimeter (daylight) vs core zones
Post-installation fine-tuning capability
Light wells / atriums in multi-storey designs
Architectural integration: Light wells and atriums bring daylight deeper
(enhancing daylight harvesting). Light-coloured walls (~20–30% reflectance) increase
uniformity. Dark ceilings reduce windscreen reflections.
CCTV cameras require ≥ 100 lux — provide additional fixtures
at ANPR (number plate recognition) positions.
