LED UFO high bay lights: the definitive guide for warehouses and industrial units

The maintenance manager of an 8,000 m² logistics centre opens this month's electricity bill. And realises that his 120 metal halide 400W high bays have swallowed the entire quarterly budget in consumption alone.

After reading this post, he's clear that switching to LED UFO high bay lights rated at 150W with a Philips Xitanium driver pays back the investment in 18 months.

What a UFO LED high bay is and why it replaces metal halides

A UFO high bay is an industrial high bay luminaire with a compact circular shape. Designed to replace old sodium vapour, mercury or metal halide fittings. Its flat, aerodynamic profile delivers excellent thermal dissipation thanks to the die-cast aluminium fins integrated into the body.

Replacing metal halide high bays with LED typically cuts electricity consumption by 60% to 70%, while maintaining or improving lux levels at the working plane. Replacing sodium vapour and mercury lamps follows exactly the same savings logic.

Differences between UFO high bays and conventional industrial high bays

The conventional plate-style high bay carries weight, depth and a less efficient heat dissipation system. The UFO concentrates the LED chip, driver and heat sink in a single block measuring less than 30 cm in diameter. Less material hanging from the ceiling and better passive cooling.

Advantages of the compact UFO design

• Reduced weight 2–4 kg on average: makes installation in older structures easier.
• IP65 or IP66 as standard on professional models.
• Discreet appearance, no bulky pendant fitting.
• Better photometric distribution with 90° or 120° optics.

Key technical specifications for choosing wisely

This is where most buyers get it wrong. Looking at the wattage alone isn't enough. You need to cross-check power, lm/W luminous efficacy, driver and dimming.

Power and luminous flux: from 80W to 200W

The LED UFO high bay 100W 150W 200W range covers 90% of industrial installations. As a quick reference:

• 100W replaces 250W metal halide.
• 150W matches a 400W metal halide.
• 200W replaces 500–600W metal halide.

lm/W efficiency: what figure is good enough

Anything below 120 lm/W, rule out the model. Today's professional standard is the 150 lm/W industrial LED high bay. Premium models with Lumileds chips or the UFO LED high bay with Osram chip reach 170–180 lm/W.

Philips Xitanium driver vs standard driver

The driver is the component most likely to fail. A Philips Xitanium UFO LED high bay offers surge protection and efficiency above 92%. The dimmable Philips Xitanium driver ships with a built-in 1–10V output, removing the need for external modules. Generic unbranded drivers are the number one cause of returns after two years.

1–10V dimming: extra savings with sensors

The 1–10V dimmable LED UFO high bay connects to presence sensors or ambient light sensors. In a logistics warehouse with partial shifts, this adds another 15–20% in savings.

Mounting height and spacing between light points

The UFO LED high bay mounting height dictates the optics and the power. The industrial luminaire installation height also sets the spacing between fittings. A common mistake is installing 200W units in a 5-metre-high unit and dazzling the operators.

Units under 6 metres

80–100W models with 120° optics. Spacing between luminaires: 4–5 metres.

Units from 6 to 12 metres

The natural home of the LED UFO high bay for industrial units at 150W. 90°–120° optics depending on width. Spacing 6–8 metres.

High-bay warehouses over 12 metres

Here the high bay LED UFO for warehouses at 200W with narrow 60°–90° optics takes over. Aisles with tall racking demand a concentrated beam to reach the floor with sufficient lux.

IP protection and resistance in industrial environments

The IP65 industrial LED high bay is the minimum acceptable rating for units with airborne dust. If you're dealing with high humidity, fumes or hose-down cleaning, step the IP65 IP66 protection rating up to IP66. The die-cast aluminium body and tempered glass guarantee impact resistance and operating temperatures from −30°C to +50°C. Also look for ENEC CE industrial certification, not just the basic CE mark.

Featured models by power and application

100W UFO high bay for medium-height warehouses

Ideal for 6–8 metre warehouses, mechanical workshops or covered car parks. Some models include UFO LED selectable CCT (3000K/4000K/5000K) via a side switch.

150W–200W UFO high bays for factories and logistics

The workhorse. For serious industrial units, we recommend models with Lumileds industrial LED, a dimmable driver and a 5-year warranty. 5000K colour temperature for industry is the usual choice here, since it improves contrast in precision tasks and picking.

If you need to kit out an entire unit, the LED UFO high bay bulk pack price typically offers an 8% to 15% discount over individual purchases.

ROI calculation: how much you save by switching to LED

Take the logistics centre case. 120 metal halide 400W fittings running 12 hours/day amount to 14,400 kWh/month on lighting alone.

Switching to 150W UFO: 6,480 kWh/month. At an average price of £0.18/kWh, monthly savings come to around £1,425.

The industrial LED high bay price for a professional model sits between £55 and £95 per unit. Typical ROI: 14–22 months. Beyond that, it's all profit for the rest of the declared 50,000-hour service life.

Installation and maintenance

The zero maintenance LED luminaire claim holds true when the chip, driver and heat dissipation are properly sized as a whole. Hook mounting, steel cable suspension or rigid anchoring to a beam: all three options come as standard on professional models. Direct 220–240V connection, no ballast or starter required. A qualified electrician fits 30–40 high bays per day.

Frequently asked questions

How many LED UFO high bays do I need for my unit?

As a quick rule, a 150W UFO covers 25–35 m² in units 8–10 metres high. Divide the usable floor area by that figure and add a 10% margin. A proper lighting design study is mandatory if you need to comply with BS EN 12464-1.

What UFO wattage replaces a 400W metal halide?

A 150W high bay with a minimum efficiency of 150 lm/W (22,500 lumens) replaces the 400W metal halide, which delivered around 20,000 real lumens after depreciation.

Do UFO LED high bays withstand dusty and damp environments?

Yes, as long as you choose IP65 or IP66. IP65 covers full dust ingress protection and water jets; IP66 adds resistance to powerful jets. For cold stores, wash bays or food-grade industry, insist on IP66 as a minimum.

What does 1–10V dimmable mean on an industrial high bay?

It's an analogue dimming protocol that varies the output between 10% and 100% via an external signal (sensor, timer, dimmer). It lets you integrate the high bay into smart management systems without swapping the driver.

How long does it take an LED UFO high bay to pay for itself?

Between 12 and 24 months in installations running more than 10 hours a day. The payback shortens further if you combine dimming with presence sensors.

Can I install UFO LED high bays outdoors?

Only under a canopy or covered porch. For full exposure, industrial LED floodlights are a better fit. UFO units are indoor luminaires, even though their IP rating makes them splash-resistant.

What warranty do quality industrial LED high bays carry?

The 5-year UFO LED warranty is the professional standard. Be wary of models offering only 1 or 2 years: they usually pair a generic driver with a low-grade chip.

Switching to LED is no longer a technical decision, it's an accounting one. If your industrial unit is still lit by metal halides, every month that goes by you're handing money over to the electricity company.