Water & Wastewater

Water and Wastewater Lighting Solutions

The Industrial Water Treatment Plants (WTP) environment is characterized by a number of harsh conditions that electrical equipment and lighting systems, in particular, must meet. Firstly, they are in a high humidity environment, which means equipment installed in the active areas must have ingress protection of IP66/67. WTP deal with large volumes of liquified human waste and this means equipment biofouling is an ever-present reality, not just for equipment immersed in sewage sludge, but also above surface equipment. WTPs are full of vibrating equipment so equipment must be able to withstand continuous vibration. In addition, the natural decomposition of large volumes of human wastewater generates appreciable amounts of dangerous and explosive gases such as hydrogen sulfide and methane.  Purifying chemicals used in the treatment process such as ammonia, chlorine, ozone, and chlorine dioxide can also pose a toxic or explosive threat.

Water treatment plant

The safety standard that WTP’s throughout North America must adhere to are set by the National Fire Protection Agency in NFPA 820, the Standard for Fire Protection in Wastewater Treatment and Collection Facilities. This standard provides requirements for protection against fire and explosion hazards specific to wastewater treatment facilities and their associated collection systems.

According to the NFPA-820 2020 standard, most pumping stations, spaces, and buildings that are found in wastewater treatment plants are hazardous locations, either Class I Div 2/ zone 2 or Class I Div 1/zone 1. In these locations, electrical equipment must be properly designed and certified, securely connected as per applicable electrical code, and regularly inspected and maintained. In Canada, section 18-004 of the Canadian Electrical Code (CSA C22.1-18), WTP managers are legally required to identify all areas that are an explosion risk.

Water & Wastewater Solutions - Nemalux

Figure 1: Water Treatment Plant processes (Source: CK-12 Foundation/Wikimedia)

Retrofitting legacy HID systems with LED systems

Before the advent of LED luminaires, water, and wastewater treatment facilities traditionally used high-intensity discharge (HID) luminaires such as High-pressure sodium (HPS), metal halide, and mercury vapor lights (now banned in the US) as well as T12 Fluorescent lamps. A large facility may have hundreds of such fixtures. Today, LED luminaires are beginning to replace these because of their many advantages. They offer plant operators higher efficiencies (50%+) and longer life (10 years vs 2 years), are able to withstand vibration much more effectively than HID, operate over a much broader temperatures range and turn on instantly, in contrast to long warm-up times of HIDs.

Lighting is but one of many systems in a WTP but it plays a critical role. Without it, not much maintenance can be done on any other system. In many WTP, the small maintenance staff can waste much of its time taking care of lighting system failures, leaving less time for other maintenance tasks.

Lighting Areas in a WTP

Lighting is used in these main areas:

  • General Lighting – Fluorescent, High bay and flood lights for area lighting of parking lots, offices, processing docks, walkways, treatment rooms
  • Hazardous Location Lighting – Lighting in locations where explosive or toxic gases are liberated such as H2S, Methane, Ammonia, Chlorine, Ozone.
  • Portable Lighting – Handheld lights such as lanterns, drop lights and flashlights are employed for confined spaces, inspection and washdown.
  • UV-C for Disinfection – A growing trend is to employ UV-C for disinfecting water because it is not corrosive and leaves no residues.

Benefits of LED luminaires for WTP

Due to the improved performance of LEDs over traditional forms of lighting, the reduced maintenance allows crews to spend their time addressing other priority maintenance issues. Operators see many benefits. Light can be optimized by intelligent design and selection, maintenance cost is reduced, as is energy cost and overall light levels are increased. These dramatically lower plant emissions and can recover their investment in as few as two years. The upgrade is a snap as well. Many manufacturers provide retrofit kits to adapt to existing power supplies and can take as little as an hour per luminaire.

Wastewater Lighting - Nemalux

Nemalux Solutions for WTP Lighting

Nemalux offers a variety of lighting solutions to replace and retrofit luminaires commonly used in WTPs. Most models come in Class I, Div 2 (zone 2) option to allow mounting in hazardous locations if required. To make it easy to cross HID luminaires to the equivalent LED luminaire, Nemalux provides a product matching table found here. Clients trust Nemalux for industry leading lead times measured in weeks, and excellent client support.

Here are some of the WTP lighting solutions provided by Nemalux:

  • The Nemalux MR is a versatile LED luminaire that can replace 75 – 150W HID fixtures mounted between 8 – 14 feet
  • Nemalux BL is a direct replacement for T12 vapor tight fluorescent lamps with convenient thru-wiring allowing daisy-chaining multiple units
  • NL is a part of the linear series that can also replace fluorescents
  • The AR has high lumens output and is used for high bay area lighting mounting between 25 and 100 feet above.
  • The LS Light Stringer is a temporary and portable work light that allows daisy-chaining of many modules.
  • The EXC is a Class I Div 1 (Zone 1) luminaire that is ideal for confined space lighting.

These luminaires confer all the advantages of LED lighting described above.

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Competitive Advantages

Nemalux has an extensive and growing library of luminaire use cases to help clients find installed applications that match their own and help them with their light decision-making process.

Although Nemalux manufactures world-class industrial lighting products, we distinguish ourselves as a solutions-oriented company. We offer hazardous location and industrial lighting solutions for rail, transport, and tunnels, based on the products we manufacture. We differentiate ourselves from our competitors through four pillars: technology, service, lead time, and pricing.


Nemalux offers a broad range of industrial luminaires with unique design features that increase resiliency, lifetime, performance and ease of maintenance. Our luminaires have a wide range of configurable optical profiles and mounting options, making them some of the most versatile in the industry.  Our luminaires meet a broad range of industry certifications including hazardous location Class I, Div 2, Class I, Div 1, DLC, Dark Sky, IP66/67/69, Marine (UL1598A), and NSF. We can cross any major brand to our luminaires.   We also offer a variety of support structures as well as complete turnkey lighting solutions that are ready to install out of the box.

Value-added Services

For clients who do not have their own in-house lighting expertise, we offer complimentary lighting design and layout services. By tuning the optical profiles of our luminaires, we can reduce the luminaire count on your project, saving you up to 30% on costs compared to competitors. Optimum design is important as a poorly designed lighting system suffers the risk not only of underperformance, but overdesign can result in excessive, wasted light output, which over the lifetime of the product, can result in higher energy costs that can exceed the initial capital outlay.

Good design practices are not only ecologically responsible but also save clients considerable time and money. By designing the optimal system to meet the target illumination required, this results in the lowest capital and operational cost over the lifetime of the system.

Other value-added services include uniquely tagging each luminaire to match with the naming convention in the lighting layout diagrams. This ensures efficient placement of the luminaire and avoids confusion when large numbers of luminaires are involved.


Our products go toe-to-toe with the market leaders but are priced at a fraction of the price. If you are working with legacy lighting products and are interested in upgrading, we can cross any competitor’s model to our own. Nemalux solutions provide substantial savings on your purchase without compromising on quality, reliability, lifetime, and performance.

Lead Time

Our lead times are amongst the shortest in the industry. Usually, most off-the-shelf luminaires are shipped in one or two weeks maximum. When you only have a short period of factory downtime to do your maintenance and upgrade, you can rely on us.

Click above to see our full range of industrial LED lighting solutions and applications.

To discuss your requirements with one of our LED Lighting experts, call or email us today.

Fill out our Request For Information form if you need more details on this service.

How can we help you?

Nemalux has your hazardous location and industrial lighting needs covered! Click the button below to submit a Request for Quote.

Nemalux takes pride in designing and manufacturing industry leading industrial and hazardous location outdoor LED lighting solutions.

Sam Pogosian
CEO, Nemalux Inc.
Nemalux MR series industrial LED luminaire, HID replacement, certified for hazardous location (class I division 2 / c1d2), marine (UL 1598), Dark Sky and DLC area lighting

The Nemalux MR is a versatile LED luminaire that can replace 75 – 150W HID fixtures mounted between 8 – 14 feet.

High output model of Nemalux BL series linear industrial LED luminaire, marine and hazardous location class I div 2 (c1d2) approved and replacement for vapour tight fluorescent light

Nemalux BL is a direct replacement for T12 vapor tight fluorescent lamps with convenient thru-wiring allowing daisy-chaining multiple units.

Adjustable angle mount Nemalux NL series linear industrial LED luminaire, IP66, marine and hazardous location class I div 2 (c1d2) approved and replacement for linear fluorescent light fixtures

NL is a part of the linear series that can also replace fluorescents.

Nemalux AR Series industrial, high lumens, high bay LED luminaire for area lighting - hazardous location class I division 2 (c1d2), marine (UL 1598), Foodsafe (NSF), Dark Sky (IDA) and DLC approved

The AR has high lumens output and is used for high bay area lighting mounting between 25 and 100 feet above.

Nemalux LS Series Light Stringer modular industrial LED luminaire for temporary lighting and portable applications with IP66, marine and hazardous location (class I div 2, c1d2) certifications

The LS Light Stringer is a temporary and portable work light that allows daisy-chaining of many modules.

Nemalux EXC series of low profile explosion proof industrial LED luminaire, IP66 and hazardous location class I div 1 and 2 (c1d1,c1d2) approved

The EXC is a Class I Div 1 (Zone 1) luminaire that is ideal for confined space lighting.

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