We've learned the hard way that lighting design can't be an afterthought in racked warehouses. Over our two decades of fabrication and installation, we've seen too many operators struggle with dark aisles, blocked fixtures, and expensive retrofits because the lighting consultant never spoke to the racking contractor. That's why we now coordinate lighting design with every layout we produce — before the steel arrives onsite.

Why Racking Layout Drives Lighting Strategy

Your rack configuration determines where light can actually reach. We've walked through warehouses where expensive LED fixtures are perfectly positioned for an empty floor, but completely useless once 8-metre selective racking goes in. The steel creates shadows, blocks sightlines, and changes how forklifts move through the space.

When we survey a site, we're noting beam heights, aisle widths, and picking patterns because these directly impact where fixtures need to go. A narrow aisle VNA system needs different lighting than wide-aisle selective racking. Drive-in systems create deep shadows that standard overhead lighting can't penetrate. Heavy-duty cantilever creates entirely different shadow patterns than selective beam racking.

We map this during the layout phase because moving lighting later costs significantly more than getting it right upfront.

Beam Heights and Fixture Placement

The critical coordination happens at beam level. We've seen fixtures mounted at 4 metres in a warehouse destined for 6-metre racking — the steel blocks half the light output. Conversely, we've seen fixtures mounted at 8 metres for 3-metre racking, creating harsh shadows and poor task lighting at picking level.

Our approach: we provide the lighting consultant with exact beam elevations for every aisle. If you're running 2.4-metre beam levels for picking, fixtures need to account for pallet loads extending below the beam. If you're storing 2-metre pallets on 3.6-metre beams, the lighting strategy is completely different.

For mezzanine installations, this becomes even more critical. The mezzanine floor creates a ceiling for the ground level, and structural beams create additional obstacles. We coordinate the exact positions of mezzanine structural members so lighting can be planned around them, not retrofitted after.

Aisle Width and Light Distribution

Narrow aisles need different lighting than wide aisles, but it's not just about fixture spacing. In our VNA installations — typically 1.6 to 1.8-metre aisles — we coordinate with lighting designers to ensure fixtures provide even distribution down the full aisle length without creating glare for the wire-guided forklift operators.

Wide-aisle selective systems give more flexibility, but the forklift turning radiuses still matter. We've mapped forklift movement patterns in our layouts, and we share these with the lighting team. If a counterbalance forklift is making regular 90-degree turns at specific intersections, those areas need better illumination for safety.

For drive-in racking, the challenge is different again. Light needs to penetrate deep into the storage lanes, but the structural steel creates a tunnel effect. We coordinate fixture placement to provide adequate illumination at the back of 6-pallet-deep lanes, which often means different strategies than the main aisles.

Forklift Operations and Safety Lighting

We coordinate lighting around actual forklift operations because we've seen the safety issues when this is overlooked. Reach trucks extending into racks need clear visibility of the pallet face and beam connections. Counterbalance forklifts need good illumination at floor level for safe travel, especially around corners and intersections.

For our heavy-duty installations — handling loads over 2,000kg per pallet — the safety margins are even more critical. Poor lighting during heavy lifting operations isn't just inconvenient; it's dangerous. We provide the lighting consultant with load charts and operating patterns so they can prioritise illumination where heavy lifts occur.

In facilities with multiple forklift types, we map the different operating zones. If VNA trucks operate in the main storage area while counterbalance trucks handle receiving, the lighting needs reflect these different requirements.

Coordination Timeline and Documentation

We coordinate lighting during the layout approval phase, not after steel fabrication begins. Once we have client approval on the racking layout, we immediately share the technical drawings with their lighting consultant or MEP contractor. This includes beam elevations, structural member positions, aisle centerlines, and forklift operating areas.

For mezzanine projects requiring BCA submission, lighting coordination happens even earlier because it affects the architectural plans. We ensure the structural design accommodates the lighting strategy, not the other way around.

The documentation we provide includes exact positions of any rack-mounted accessories that could interfere with lighting — mesh guards, column protectors, or end-of-aisle safety barriers. These details matter when fixtures are being positioned and aimed.

Common Issues We Help Avoid

We've remediated enough lighting problems to know what goes wrong when coordination doesn't happen. Fixtures mounted directly above beam levels create harsh shadows on the pallet faces below. Inadequate aisle lighting makes barcode scanning difficult. Poor illumination at rack connections makes safety inspections nearly impossible.

In one of our recent Tuas installations, the original lighting design assumed empty floor space. When our 7-metre selective racking went in, three entire aisles were left in shadow. We caught this during coordination and repositioned fixtures before installation. The alternative would have been expensive retrofit work and operational disruption after handover.

For cantilever racking storing long materials, the overhang creates shadows that standard warehouse lighting doesn't address. We coordinate additional fixtures or different mounting positions to ensure safe handling of 6-metre steel sections or timber lengths.

How early should lighting coordination begin?

We coordinate lighting as soon as the racking layout is approved, before we begin fabrication. Any changes after steel production starts become expensive modifications rather than design optimisations.

Do you work with specific lighting contractors?

We work with whatever MEP contractor or lighting consultant the client has engaged. Our role is providing the technical racking data they need for proper fixture placement and aiming.

What about emergency lighting in racked warehouses?

Emergency lighting coordination is even more critical because racks create complex shadow patterns during power failures. We ensure emergency fixtures provide adequate egress lighting through all aisles, which often requires more fixtures than an empty warehouse.

Can lighting be added after racking installation?

Yes, but it's significantly more expensive and disruptive. Proper coordination upfront avoids the need for scissor lifts, temporary storage relocation, and fixture repositioning after your warehouse is operational.

How do mezzanine floors affect lighting design?

Mezzanines create two distinct lighting zones and the structural steelwork creates additional shadows. We coordinate both the ground level and mezzanine level lighting requirements, including stairwell and loading area illumination, during the structural design phase.

Getting warehouse lighting right requires coordination between racking and MEP contractors before steel arrives onsite. We've mapped the challenges and coordination points across hundreds of installations, from selective systems to complex mezzanine builds. If you're planning a racked warehouse project and want proper lighting coordination from the start, let's discuss your specific requirements: WhatsApp us here.