Warehouse lighting comes down to a handful of fixture families: LED high-bay (linear and UFO), low-bay, linear strip and wraparound, tube and TLED retrofits, troffers and panels, vapor-proof and explosion-proof units, and dedicated emergency fixtures. The fastest way to pick the right one is to match mounting height and task to the fixture, then confirm the result against OSHA, DOE, and IES guidance.
TL;DR:
- For open areas above 20 feet, choose high bays; linear beams suit long aisles, while round UFO fixtures spread light across open storage floors.
- Specify CRI of at least 80 for general storage and 90 or higher wherever workers inspect color critical items.
- Use vapor proof fixtures rated IP65 or higher for washdowns; flammable gas, vapor, or dust requires a hazardous location listing matched to the specific class.
- Type B tubes remove the ballast as a future failure point, while Type C costs more upfront but works better with dimming and sensor systems.
- Retrofit kits in existing housings can cut energy use by 40% to 60% before controls, while round the clock use shortens payback.
Table of Contents
- Matching Fixture Types to Warehouse Zones
- Fixture Specs That Decide Performance
- A Selection Checklist Before You Sign Off on Fixtures
- Where the Energy and Maintenance Savings Come From
- Planning the Retrofit or Installation Without Surprises
- Our Experience With Commercial Lighting Projects
- What We See Go Wrong Most Often
- Get a Lighting Assessment From a Local Electrical Team
- FAQ
- Sources
Matching Fixture Types to Warehouse Zones
Each warehouse zone has a fixture that fits it best, and most mismatches trace back to picking a fixture for the ceiling instead of the task underneath it.
- LED high-bay (linear or UFO): open floor areas and wide aisles with mounting heights above 20 feet, used for bulk storage and shipping docks.
- Low-bay fixtures: mounting heights between roughly 12 and 20 feet, common in smaller warehouses, workshops, and mezzanine storage.
- Linear strip and wraparound fixtures: narrow aisles, conveyor lines, and racking corridors where a wide round beam wastes light on the rack frames.
- Troffers and panels: offices, break rooms, and quality-control stations attached to the warehouse floor.
- Tube lights and TLEDs: retrofits of existing fluorescent troffers and strip fixtures without replacing the housing.
- Vapor-proof fixtures: washdown areas, cold storage, and dusty environments where moisture or particulate would damage an open fixture.
- Explosion-proof fixtures: areas with flammable vapors, gases, or combustible dust, including some chemical and fuel storage zones.
- Wall-mounted and exterior fixtures: loading docks, yard areas, and building perimeters.
- Emergency and egress lighting: stairwells, exit routes, and any path a worker needs during a power loss.
High-bay and low-bay fixtures are typically specified as new luminaires during a full retrofit, while tube lights and TLEDs are the usual choice when a facility wants to keep existing troffer housings and cut project cost. Vapor-proof and explosion-proof units are almost always purpose-built replacements rather than retrofits, since the enclosure itself is the safety feature.
Fixture Specs That Decide Performance
Fixture selection gets more precise once you look past the category name and into lumen output, beam spread, and listing requirements.
- High-bay, linear versus UFO: Linear high-bays throw a rectangular beam that suits long racking aisles and loading lanes, while UFO-style round high-bays spread light evenly across open floor storage and cross-aisle traffic. Both typically land in the 10,000 to 40,000 lumen range for a single fixture, with DOE/FEMP procurement guidance setting a baseline of at least 10,000 lumens and 175 lumens per watt for high-bay products.
- Low-bay fixtures: These sit lower, so spacing and beam angle matter more than raw output. DOE/FEMP guidance puts low-bay baselines at 5,000 to 10,000 lumens and at least 143 lumens per watt, and linear low-bay units generally outperform round ones in narrow rooms because the rectangular beam avoids wasted spill on walls.
- Linear fixtures and TLEDs: TLEDs are sorted into Type A (plug-and-play on existing ballasts), Type B (ballast-bypass, wired direct to line voltage), and Type C (run from an external LED driver). Type B tubes are the most common retrofit choice because they remove ballast failure as a future maintenance item, while Type C offers the best dimming and control compatibility for facilities planning occupancy sensing.
- Troffers and panels: Office and mezzanine spaces attached to warehouse floors typically call for 3,500 to 5,000 lumens per fixture, 80+ CRI, and a color temperature in the 3500K to 4000K range for comfortable, accurate work under a desk or inspection bench.
- Vapor-proof and explosion-proof fixtures: Vapor-proof units carry an IP65 or higher ingress rating for washdown and high-humidity areas, while explosion-proof fixtures require NRTL or UL hazardous-location listings matched to the specific gas, vapor, or dust class present. Washdown food storage and cold-storage docks are typical vapor-proof applications; fuel storage and certain chemical handling areas call for explosion-proof listings.
- Emergency and egress fixtures: These need battery backup or connection to a central inverter system sized for the path-of-egress duration your local code requires, and they should be budgeted as a distinct line item rather than assumed to piggyback on general lighting circuits.
A Selection Checklist Before You Sign Off on Fixtures
Before approving a lighting proposal, run it through a short list of practical checks.
- Measure actual mounting height, not ceiling height, since racking, ductwork, and sprinkler clearances often lower the usable fixture position.
- Confirm illuminance at the working plane meets OSHA's 5 foot-candle minimum for active work and cargo areas, and push higher for inspection or picking stations per IES task-based recommendations.
- Check lumen output and efficacy against DOE/FEMP baselines: roughly 10,000 lumens and 175 lm/W for high-bay, 5,000 to 10,000 lumens and 143 lm/W for low-bay.
- Specify CRI of 80 or higher for general storage and 90 or higher where color-accurate inspection happens.
- Review uniformity ratio and glare control in the layout drawing, not just average foot-candles, since a bright center aisle with dark corners fails the same inspection a dim warehouse does.
- Ask whether occupancy sensors, dimming, or daylight controls are included or add-on, since controls change both the wiring plan and the payback math.
Pro Tip: Ask your contractor for a point-by-point foot-candle layout, not just an average lux number. Averages hide dark corners that fail an OSHA walk-through.
Where the Energy and Maintenance Savings Come From
LED fixtures cut both electricity use and maintenance calls compared to the metal halide and fluorescent systems many older warehouses still run, and the savings compound once controls are added.
- LEDs run cooler than HID and fluorescent sources, which reduces refrigeration load in cold-storage facilities and cuts a cost most lighting estimates ignore.
- Occupancy sensors, task tuning, dimming, and scheduling each add incremental savings on top of the fixture swap itself, and most LED drivers now ship control-ready.
- The DLC Qualified Products List is the standard reference for rebate-eligible fixtures, and DLC-listed products typically carry a five-year manufacturer warranty.
- Retrofit kits installed in existing housings commonly deliver energy savings in the range of 40% to 60% before controls are added, according to federal LED and controls guidance, a figure that climbs further once occupancy sensing and dimming are layered in.
- Payback timelines differ sharply by usage pattern: a 24/7 distribution center sees a much faster return than a facility running one shift, five days a week.
A documented case study at a high-utilization facility reached an 11-month simple payback when bulk purchasing and utility rebates were combined with round-the-clock occupancy. Leased facilities can often improve on that by coordinating the retrofit cost with a landlord's tenant-improvement allowance rather than carrying the full capital cost alone.
Planning the Retrofit or Installation Without Surprises
A lighting project runs smoothly when the procurement decisions are made before the lift gets rented, not during the walk-through.
- Retrofit kit versus new luminaire: Kits reuse the existing housing and wiring, cut installation time, and suit facilities wanting to avoid disturbing old ceiling material, while new luminaires offer better optics and longer rated life when the housing itself is due for replacement.
- TLED type selection: Type B tubes remove the ballast as a failure point and are the common retrofit default; Type C tubes cost more upfront but integrate more cleanly with dimming and sensor networks.
- Access planning: High-bay fixtures above 20 feet require scissor lifts or boom lifts, so schedule installation in blocks that minimize repeat equipment rental and keep spare lamps or drivers on hand for the first year of service calls.
- Lumen maintenance and warranty terms: Specify L70 or L90 lumen-maintenance ratings and confirm driver and heat-sink quality in the warranty language, since cheap drivers are the most common cause of early fixture failure.
- Electrical capacity coordination: Bundle any panel upgrade or circuit work into the same outage window as the lighting installation rather than scheduling two separate shutdowns.
Our Experience With Commercial Lighting Projects
Our team at Guardian Electrical Contractors handles commercial lighting installation, panel upgrades, and circuit and outlet work as part of the same project, which matters when a warehouse retrofit also needs added capacity. We start every consultation with client-supplied photos so we can plan fixture placement and circuit routing before we're on site, and we coordinate specification against the standards covered above, including rebate paperwork and tenant-improvement coordination where it applies.
What We See Go Wrong Most Often
The most common mistake we see is picking a fixture for the ceiling height alone and skipping the task analysis underneath it, closely followed by leaving controls out of the budget and underestimating how often someone will need a lift to service a 30-foot fixture. Measure your mounting heights and check your existing control wiring this week.
— Logan
Get a Lighting Assessment From a Local Electrical Team
We assess, specify, and install commercial lighting systems, and we handle the rebate paperwork and code questions that come with a warehouse-scale project rather than leaving you to sort it out. Our consultations start with photos you send, which lets us plan fixture placement and circuit capacity before a truck shows up.
| What we handle | Why it matters |
|---|---|
| Fixture assessment and specification | Matches fixture type to mounting height and task |
| Panel and circuit coordination | Avoids a second outage window later |
| Code-aware, listed-fixture installation | Keeps hazardous-area and washdown fixtures compliant |
A facility running fixtures around the clock can see energy and maintenance savings substantial enough to pay back a retrofit in well under a year when rebates and bulk purchasing align. If a warehouse network also needs updated wireless coverage during the same project, a structured warehouse network design is worth planning alongside the electrical work rather than after it. Ready to move forward? Request an estimate through our lighting and ceiling fan services page and we'll schedule a site assessment.
FAQ
What are the different styles of overhead lights?
Overhead warehouse lighting generally falls into high-bay, low-bay, linear strip, troffer or panel, and tube or TLED styles, chosen by mounting height and the task below. Vapor-proof and explosion-proof enclosures are specialized overhead styles used where moisture, dust, or flammable atmospheres are present.
What are the 7 main types of lamps?
Common lamp technologies used historically and today include incandescent, halogen, fluorescent, compact fluorescent, metal halide, high-pressure sodium, and LED. LED has largely replaced the others in new warehouse installations because of lower energy use and longer rated life.
What are the different types of side lighting?
Side or wall-mounted lighting in warehouses typically includes wall packs for perimeter and dock areas, vertical linear fixtures for racking aisles, and exterior-rated fixtures for loading docks and yard zones. These fixtures supplement overhead lighting rather than replace it, especially where shadows fall between rows of racking.
What are types of lighting equipment?
Lighting equipment includes the fixtures themselves (high-bay, low-bay, troffer, TLED, vapor-proof, explosion-proof), the drivers or ballasts that power them, and the controls layer, which covers occupancy sensors, dimmers, and daylight sensors. A complete installation also includes mounting hardware, wiring, and in hazardous areas, the listed enclosure components required for code compliance.
How many lumens do I need for warehouse lighting?
High-bay fixtures for open floor and racking areas generally target at least 10,000 lumens at 175 lumens per watt, while low-bay fixtures target 5,000 to 10,000 lumens at 143 lumens per watt or better. The right number also depends on meeting OSHA's 5 foot-candle minimum at the working plane for active work areas.
Sources
- 1917.123 - Illumination. | Occupational Safety and Health Administration
- Purchasing Energy-Efficient Commercial and Industrial LED Luminaires | Department of Energy
- Prologis retrofit case study (DOE-related publication)