Factory floors are among the most demanding lighting environments in any building. High ceilings, dust, heat, tall machinery and long operating hours all punish conventional lighting, and nowhere is that more visible than in the monthly electricity bill. For decades, 400 W and 1000 W metal halide lamps were the default choice, but they waste up to half of their energy as heat, degrade quickly and need constant maintenance. The modern answer is the LED high bay fixture — but only when it is sized and installed correctly. Getting the LED high bay wattage, mounting height and spacing right is the difference between a warehouse that looks bright and one that actually delivers the lux levels your operators need. This guide walks through the selection and installation process step by step.
Looking for the right lighting solution? Explore our LED High Bay UFO-A Series or see our Factory LED Lighting projects.
Choosing the Right LED High Bay Wattage for Your Factory
Wattage selection starts with two numbers: the mounting height of the ceiling and the target illuminance of the work area. As a general rule for factories with standard 6–15 m ceilings, higher mounting heights demand more wattage to push usable light down to the floor and into aisles.
| Mounting Height | Recommended LED High Bay Wattage | Typical Application |
|---|---|---|
| 6–8 m | 100–150 W | Workshops, assembly lines, small production halls |
| 8–10 m | 150–200 W | Medium halls, machine shops, packaging areas |
| 10–12 m | 200–300 W | Large production floors, warehouses with racks |
| 12–15 m | 300–400 W | High-bay logistics centers, steel and heavy industry |
Two notes on LED high bay wattage. First, watts are only a proxy — lumen output and beam angle do the real work. A 200 W fixture delivering 130 lm/W produces 26,000 lumens, which is roughly the light output of a 400 W metal halide lamp. Second, task type matters: precision assembly and inspection areas need higher lux than storage aisles, so always plan around the illuminance target, not just the ceiling height. A photometric design, such as the free Dialux layout Worldhand provides, will confirm the exact wattage and quantity before you spend a single dollar.
High Bay Mounting Height and Installation Spacing
Your factory high bay installation should follow one core rule of thumb: space fixtures 1.2–1.5 times the mounting height apart. At a 10 m mounting height, that translates to 12–15 m between centers, which keeps uniformity acceptable while avoiding wasteful overlap. Taller or narrower optics can stretch that ratio; wide-beam fixtures cannot.
- Mounting method: hook and ring for trusses, pendant cable for catwalks, or surface brackets — choose based on ceiling structure and vibration levels.
- Orientation: aim the beam along aisles and toward workstations, never across walkways where glare becomes a hazard.
- Heat: in hot climates, use fixtures with die-cast aluminum heatsinks and check the ambient temperature rating — rooftop heat can exceed 45 °C.
- Maintenance access: install fixtures where a scissor lift or catwalk can reach them; relamping at height is your biggest hidden cost.
For warehouses with racking, mount fixtures above the rack aisle rather than over the racks themselves — vertical surfaces of the racks are the lighting challenge, and only an aisle-aligned layout illuminates them evenly.
Color Temperature: Matching Light to the Task
Color temperature shapes both visibility and comfort on a factory floor. The table below summarizes the practical choices:
| Color Temperature | Best For | Effect |
|---|---|---|
| 4000 K (neutral white) | Assembly, machining, general production | Comfortable, less eye fatigue over full shifts |
| 5000 K (daylight white) | Inspection, quality control, detail work | Sharper contrast, higher alertness |
| 6500 K (cool daylight) | Large open warehouses, loading docks | Maximum perceived brightness |
Most factory owners settle on 4000–5000 K, and fixtures such as Worldhand’s LED High Bay UFO series are available in both, so you can mix zones in one installation. If quality inspection is critical, also check the CRI — 80+ renders colors accurately enough to catch defects that 70 CRI fixtures would hide.
LED High Bay vs. Metal Halide: The Energy Case
Replacing metal halide with LED is the fastest payback project in industrial lighting. Compare a single 400 W metal halide setup with a 200 W LED high bay running 3,000 hours a year:
| Metric (per fixture, per year) | 400 W Metal Halide | 200 W LED High Bay |
|---|---|---|
| Input power (incl. ballast losses) | ~460 W | ~215 W |
| Energy use at 3,000 h | 1,380 kWh | 645 kWh |
| Energy cost at $0.12/kWh | $165.60 | $77.40 |
| Maintenance interval | ~8,000 h (re-lamp) | 50,000 h+ (5-year warranty) |
That is a 50–60% energy saving plus the elimination of lamp and ballast replacement labor — on a 100-fixture hall, tens of thousands of dollars over the fixture lifetime, with instant full light and no warm-up time on cold mornings.
Why the Worldhand LED High Bay UFO Series
Worldhand’s LED High Bay UFO series is engineered for exactly these conditions: die-cast aluminum heatsink construction for reliable thermal management, IP65 ingress protection against dust and washdown, 50,000-hour rated life backed by LM79 and TM21 photometric data, and a full five-year warranty. Every fixture carries CE, LVD and EMC certification and is manufactured under ISO9001 quality systems — and the company has been building industrial lighting since 2010, so the engineering is proven in real factories.
Frequently Asked Questions
Q: Can I replace a 400 W metal halide fixture with a 200 W LED high bay directly?
A: In most cases, yes. A 200 W fixture at 130 lm/W delivers comparable or better light output, and the narrower beam of the UFO design actually improves floor illuminance at height. Confirm with a photometric layout first if uniformity is critical.
Q: What if my factory ceiling is higher than 15 meters?
A: Above 15 m, move from standard UFO high bays to higher-wattage versions or high-lumen projectors, and plan for additional ambient light. Worldhand can model your specific hall in Dialux to recommend the right combination.
Q: Which color temperature is better, 4000 K or 5000 K?
A: For general production and assembly, 4000 K reduces eye strain over long shifts; for inspection and detail work, 5000 K improves contrast. Many factories use both in different zones.
Q: Do you provide photometric files and lighting design?
A: Yes. Worldhand provides IES files, LM79/LM80 test data, and a free Dialux design for your factory layout, so you know the exact fixture count, wattage and spacing before purchasing.
Get Your Free Dialux Design for Factory High Bay Installation
Choosing the right LED high bay wattage and high bay mounting height doesn’t have to be guesswork. Worldhand Technology Co., Ltd. will prepare a free Dialux lighting design for your factory floor — including fixture layout, lux levels and energy comparisons — at no cost and with no obligation. Every Worldhand LED High Bay UFO fixture ships with CE/LVD/EMC certification, TM21/LM79 data, ISO9001 quality assurance and a five-year warranty. Email info@worldhandlux.com, call +86-512-50108790, or message us on WhatsApp at +86-189-126-83525 — send us your floor plan and ceiling height today, and let the numbers do the talking.
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Need help with your project? Contact Worldhand for a free Dialux lighting design and quotation — email info@worldhandlux.com, call +86-512-50108790, or WhatsApp +86-189-126-83525.
Related LED Lighting Solutions
Looking for professional LED lighting for your project? Explore our LED High Bay UFO-A Series or visit our Factory LED Lighting Solutions page to see how Worldhand can help. Contact us for a free Dialux lighting design.
