LED High Bay Buying Guide: UFO vs Linear, Wattage, Beam Angle & More (2026)

# LED High Bay Buying Guide: UFO vs Linear, Wattage, Beam Angle & More

Choosing the right LED high bay is the single most impactful lighting decision for any warehouse, manufacturing facility, or large commercial space. Get it wrong and you waste energy, create dark spots, or overspend. This guide covers every factor you need to consider.

UFO vs Linear High Bay: Which One?

UFO High Bay (Round)

• Best for: Open warehouses, gyms, retail, distribution centers
• Pros: Compact, lightweight (typically 5-15 lbs), easy to install, versatile beam patterns
• Cons: Less ideal for narrow aisle lighting
• Mounting: Hook, pendant, or surface mount
• Typical wattages: 100W, 150W, 200W, 240W
• Auvolar models: HBA Series (160 lm/W), HBB Series (155 lm/W)

Linear High Bay

• Best for: Racked warehouses with defined aisles, manufacturing lines, retail aisles
• Pros: Excellent aisle lighting, wider coverage per fixture, multiple optical distributions
• Cons: Heavier, larger mounting footprint, less flexible positioning
• Mounting: Chain, cable, or surface mount
• Typical wattages: 80W, 100W, 150W, 200W
• Auvolar model: LHB Series (150 lm/W)

Quick Decision Rule

• No defined aisles? → UFO high bay
• Defined aisles with racking? → Linear high bay
• Gym or recreation? → UFO high bay
• Manufacturing line? → Linear high bay

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Wattage Selection by Ceiling Height

Important: These assume 30 foot-candle target (general warehouse). For 50 FC (picking/packing), increase wattage by ~50% or reduce spacing.

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Beam Angle Explained

Beam angle determines how light spreads from the fixture:

Pro tip: If unsure, 90° is the safest choice. It provides good uniformity at most mounting heights without excessive spread or concentration.

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DLC Premium vs DLC Standard

Always specify DLC Premium. The 25-50% higher rebate more than offsets any price difference. Verify on the DLC QPL before purchasing.

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5 Key Specifications to Check

Efficacy (lm/W) — Higher is better. Target ≥140 lm/W for best ROI. Auvolar achieves 150-160 lm/W.

CRI (Color Rendering Index) — CRI 80+ is standard for commercial. CRI 90+ only needed for color-critical tasks (inspection, retail).

CCT (Color Temperature) — 5000K for warehouse/industrial. 4000K for retail/commercial with customer traffic.

IP Rating — IP65 minimum for any space with dust, moisture, or washdown. Even "dry" warehouses should have IP65 for longevity.

Surge Protection — 6kV minimum for indoor. 10kV for outdoor-rated or areas with frequent electrical events.

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Common Installation Mistakes

Wrong beam angle for ceiling height — Wide angle on 35 ft ceiling = dark spots between fixtures. Narrow angle on 15 ft ceiling = bright spots surrounded by darkness.

Not accounting for obstructions — Ductwork, sprinklers, and racking can block or redirect light. Survey the space before specifying.

Ignoring future flexibility — If rack layout might change, UFO high bays with medium beam offer more flexibility than linear.

Skipping photometric analysis — A quick LightSpec AI simulation takes 2 minutes and can save thousands in wrong fixtures.

Choosing DLC Standard over Premium — Saves $5-10/fixture but costs $50-100 in lost rebates.

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Spacing and Layout Rules

General Rules

• Spacing = 1.0× to 1.5× mounting height
• 25 ft ceiling → 25-37.5 ft spacing
• Use a grid pattern for open areas
• Stagger rows for better uniformity
• Add extra fixtures near walls (walls absorb light)

Quick Fixture Count Estimate

Fixtures = Floor Area ÷ (Spacing × Spacing)

Example: 50,000 sq ft warehouse, 25 ft ceilings, 30 ft spacing

= 50,000 ÷ (30 × 30) = 55.6 → 56 fixtures (round up)

At 150W each: 56 × 150W = 8,400W total = 0.17 W/ft² (well under Title 24's 0.6 W/ft² limit)

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Energy Savings Example

50-Fixture Warehouse Retrofit (400W MH → 150W LED)

Annual savings: $14,146 | Payback: 3.8 months (after SCE rebate)

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Recommended High Bay Products

For General Warehouses

• [Auvolar HBA Series UFO High Bay](/products/indoor/high-bay) — 100W to 240W, 160 lm/W, DLC Premium

For Aisle-Oriented Facilities

• [Auvolar LHB Series Linear High Bay](/products/indoor/linear-high-bay) — 80W to 200W, 150 lm/W

Need Help Choosing?

[Use LightSpec AI for instant recommendations →](https://www.auvolar.com/tools/lightspec-ai)

Related Reading

• [Warehouse Lighting: How Many High Bays?](/blog/warehouse-lighting-how-many-high-bays) — Fixture count calculator
• [LED vs Metal Halide Comparison](/blog/led-vs-metal-halide-comparison) — Full technology comparison
• [How to Calculate LED ROI](/blog/led-lighting-roi-calculator-guide) — Payback formulas
• [DLC Certification Explained](/blog/dlc-certification-explained) — Understanding DLC Premium