Quick commerce has rewritten the rules of warehousing in India. Orders that once took two
days now leave the building in ten minutes — from compact dark stores tucked
into city neighbourhoods. In that environment, lighting stops being a background utility and
becomes an operational tool. Every second a picker spends squinting at a label is a second off
your delivery promise.
Why Dark Stores Are a Different Lighting Problem
A traditional warehouse is tall, spacious, and stores pallets. A dark store is the opposite:
lower ceilings, very narrow aisles, dense shelving, small items, and constant human movement at
high speed. That creates three specific challenges:
- Deep shadows between racks — tall dense shelving blocks light, leaving
lower shelves dim exactly where small items sit. - Label reading at speed — pickers read small text and scan barcodes
constantly; poor light directly slows them and causes mis-picks. - Long operating hours — many run 16–24 hours, so inefficient lighting
compounds into a serious monthly cost.
Recommended Light Levels
| Zone | Recommended Lux | Why |
|---|---|---|
| Storage aisles | 200–300 lux | Safe movement, shelf visibility |
| Picking aisles | 300–500 lux | Fast, accurate item and label reading |
| Packing & sorting | 500–750 lux | Detail work, quality checks |
| Loading / dispatch | 200–300 lux | Safety around vehicles |
| Cold storage zones | 200–300 lux | Needs low-temperature-rated fixtures |
Fixture Choice: Linear Beats Round in Narrow Aisles
This is the single most useful tip for dark stores. Round UFO high bays throw a circular
pool of light — great for open floors, poor for narrow aisles where light hits the top of the
racks and never reaches the bottom shelves. Linear high bays or battens mounted along
the aisle push light down the full length of the corridor and much deeper into the
shelving.
For lower ceilings (under about 12 feet), linear battens are usually the right answer
entirely.
Vertical Illuminance: The Number Nobody Specifies
Most lighting designs quote light on the floor. But pickers do not read the floor — they
read shelf faces. Ask your supplier about vertical illuminance on the racking,
not just horizontal lux. This one question separates a design that works from one that looks
fine on paper and frustrates staff daily.
Controls: Where the Savings Hide
- Aisle-level occupancy sensors: light the aisle being picked, dim the
rest. In stores with uneven demand this alone can cut lighting energy significantly. - Zoning: separate control for picking, packing, dispatch and offices.
- Scheduling: lower levels during quiet overnight hours.
Practical Specification Checklist
- Linear fixtures along aisles; UFO high bays only for open areas
- 300–500 lux in picking zones, 500–750 in packing
- Ask for vertical illuminance on shelf faces
- Flicker-free drivers (constant scanning and screens)
- CRI 80+ so product colours and labels read correctly
- IP65/IP66 in dusty, humid or wash-down areas; low-temp rating for cold zones
- Occupancy sensors and zoning for 16–24 hour operations
- High efficacy (130+ lm/W) — long hours magnify every watt
Frequently Asked Questions
How many lux does a dark store need?
Picking aisles need 300–500 lux and packing areas 500–750 lux; general storage can work at
200–300 lux.
Are linear or UFO high bays better for narrow aisles?
Linear fixtures mounted along the aisle are better — they light the full corridor and reach
lower shelves, where round fixtures leave shadows.
Do motion sensors work in a busy dark store?
Yes, at aisle level. Aisles are used in bursts, so sensors dim unused aisles while keeping
active ones fully lit.
How much can better lighting improve picking?
Good lighting removes hesitation and mis-reads. Faster label reading and fewer errors
directly support tighter delivery promises.
Reway supplies linear and UFO high bays for warehouses and dark stores — LINEBAY, ULTRABAY and BAYLITE. Get a free dark store lighting layout →
