When it comes to safety and functionality of any commercial or industrial space, lighting plays a very important role. Among the more common commercial lighting solutions in New Zealand, high bay lights and low bay lights are the most popular choices for large open spaces, sheds, warehouses, and industrial areas.

Though they might look similar at a glance, these two lighting types are specifically engineered for different ceiling heights and applications.

We have written this blog to help business owners, facility managers, or electrical contractors to choose between high bay and low bay lighting, and understanding the key differences. We’ll take a deep dive into what distinguishes these two lighting systems, where each should be used, and how to choose the best option for your space.

What Are Bay Lights?

The term ‘bay light‘ refers to a type of lighting fixture designed to illuminate large indoor spaces. They’re typically mounted on ceilings or structural beams and used in settings such as warehouses, factories, retail stores, gyms, and more.

The distinction between high bay and low bay lights is primarily based on mounting height and light distribution needs.

High Bay Lighting in NZ

High bay lights are designed for high-ceilinged spaces, generally 20 feet (6 meters) or more from the floor. Because of the large vertical distance, high bay fixtures need to produce a strong, concentrated beam of light that can travel farther and still deliver adequate brightness at floor level.

Typical Mounting Heights

• 20 to 45 feet (6 to 14 meters)

Where Are High Bay Lights Used?

• Warehouses
• Factories
• Distribution centers
• Gymnasiums
• Airport hangars
• Convention halls
• Large indoor stadiums

Features and Benefits

• High lumen output: Typically range from 15,000 to over 60,000 lumens
• Narrow beam angles: Often between 60° and 120° to focus light downwards
• Energy-efficient options: LED technology reduces power consumption drastically compared to traditional HID or fluorescent lights
• Uniform illumination: Especially when using LED high bay fixtures with reflectors or lenses

Low Bay Lighting in NZ

Low bay lights are built for ceilings typically under 20 feet (around 6 meters). Since the light doesn’t need to travel far, low bay fixtures use wider beam angles and often require diffusers to spread the light evenly without harsh shadows or glare.

Typical Mounting Heights

• 12 to 20 feet (3.5 to 6 meters)

Where Are Low Bay Lights Used?

• Workshops
• Auto repair shops
• Retail stores
• Supermarkets
• Garage spaces
• Showrooms
• Storage rooms

Features and Benefits

• Moderate lumen output: Generally between 3,000 to 15,000 lumens
• Wider beam spread: Helps reduce the number of fixtures needed in smaller areas
• Ideal for task lighting: Ensures well-lit, safer environments in close working spaces
• Easy to install and maintain: Due to lower mounting height

Choosing the Right Lighting for Your Space

To choose between high bay and low bay lighting, ask yourself a few key questions:

1. How high is your ceiling?

This is the most important factor. If your ceilings are:

Above 20 feet → Use high bay lights

Below 20 feet → Use low bay lights

2. What kind of work is performed in the space?

If detailed, precision work is done (e.g., in a machine shop or an assembly line), you’ll need high CRI and bright lighting. High bay LED lights often support this well even from a distance.

3. How large is the area?

Larger areas typically need higher brightness and better distribution, which favors high bay lighting. Smaller areas may be adequately served with low bay fixtures.

4. Do you want to reduce energy consumption?

Both types come in energy-efficient LED versions, but be sure to choose dimmable fixtures with motion sensors to maximize savings.

Installation Tips

• Layout matters: Avoid over-lighting or under-lighting. Use lighting design software or consult with a specialist to plan proper fixture spacing.
• Consider reflectivity: Bright walls and ceilings can enhance the effectiveness of your lighting.
• Use controls: Occupancy sensors, daylight harvesting systems, and dimming features can reduce operational costs significantly.
• Plan for maintenance: Choose durable fixtures with accessible parts, especially for high bay lights installed at hard-to-reach heights.