Buyer Beware – LED Purchases Gone Wrong

Throughout more than 15 years in commercial lighting, we have worked with customers who contacted us after experiencing problems with previously purchased LED products. Common issues include unexpected accessory costs, inadequate light levels, incompatible fixture substitutions, premature failures, and difficulty obtaining warranty support.

Some problems result from incomplete specifications or purchasing decisions based primarily on price. Others occur when products that appear similar on paper perform very differently after installation. These examples highlight the importance of comparing complete product specifications, photometric performance, certifications, warranty terms, and supplier support before investing in a commercial lighting upgrade.

Hidden Driver and Accessory Costs

One issue we have encountered involves fixtures advertised at an attractive base price but requiring separately purchased LED drivers, mounting hardware, sensors, cords, brackets, or other accessories.

In one case, a contractor contacted us believing a shipment was missing drivers, but the products had actually been purchased from another supplier. The fixtures required separate drivers costing approximately $94 each, substantially increasing the total project cost.

Integrated products such as many LED UFO high bay fixtures normally include the driver as part of the luminaire, although product configuration varies by manufacturer and model.

Before comparing fixture prices, confirm exactly what is included:

• LED driver
• Mounting hardware
• Power cord or wiring provisions
• Sensor or control receptacle
• Motion or occupancy sensor
• Emergency backup components
• Surge protection
• Required brackets or adapters

The lowest advertised fixture price is not necessarily the lowest installed project cost.

Outdated LED Technology and Poorly Matched Color Temperatures

Low-cost fixtures may use older LED packages, less-efficient drivers, lower-performing thermal designs, limited optics, or specifications that do not fit the intended application. Price alone does not prove that a product uses outdated technology, so the actual fixture specifications should be reviewed.

Color temperature should also be evaluated separately from product quality. A fixture with a 6500K correlated color temperature is not automatically inferior, uncomfortable, inefficient, or more likely to cause eye strain.

Correlated color temperature, or CCT, describes the apparent color of white light:

• 3000K: warmer white appearance
• 4000K: neutral-white appearance
• 5000K: cooler white appearance
• 6500K: distinctly cool or blue-white appearance

Some users may prefer 4000K or 5000K over 6500K in warehouses, manufacturing facilities, shops, offices, or other commercial environments, but this is primarily an application and visual-preference decision.

CCT alone does not determine eye strain or visual comfort. Lighting comfort can be affected by glare, excessive or inadequate illuminance, luminance contrasts, fixture placement, flicker, reflections, spectrum, viewing direction, and the visual task being performed.

A poorly designed 4000K installation can be uncomfortable, while a properly designed 6500K system may be suitable for a particular application. The correct CCT should therefore be selected according to the environment and project requirements rather than treated as a universal measure of lighting quality.

Color Temperature Does Not Determine Efficiency

Fixture efficiency should be evaluated using luminaire efficacy, normally expressed in lumens per watt (lm/W).

A 5000K fixture is not inherently more efficient than a 6500K fixture, and a 4000K fixture is not inherently more efficient than a 5000K fixture.

Efficacy depends on the complete LED system, including:

• LED package technology
• Driver efficiency
• Operating current
• Thermal management
• Optical losses
• Fixture construction
• Color-rendering requirements
• Operating temperature

There can be efficacy differences among LED packages and CCT options within a particular product family, but the correct comparison is the manufacturer’s published or tested lumens-per-watt value for the exact fixture configuration.

For example, a 6500K fixture producing 150 lumens per watt is more efficacious than a 4000K fixture producing 120 lumens per watt despite its higher color temperature.

Do Not Judge LED Quality From CCT Alone

When comparing fixtures, review specifications such as:

• Luminaire efficacy in lumens per watt
• Total lumen output
• Input wattage
• CRI and other relevant color-quality data
• IES photometric file
• Driver manufacturer and specifications
• Operating-temperature range
• Surge protection
• Certifications and listings
• Lumen-maintenance data
• Warranty terms

A fixture producing approximately 100 lumens per watt may be less efficient than many newer commercial LED products, but there is no single lumen-per-watt threshold that proves a fixture contains “outdated chips.” Different fixture types, CRI levels, optics, environmental requirements, and design priorities can produce different efficacy levels.

Likewise, commercial LED fixtures exceeding 130, 150, or even higher lumens per watt are available in certain categories, but those values should not be presented as a universal performance level for all current-generation LEDs.

Inadequate Light Levels and Shadow Problems

Poor lighting design can result in insufficient illumination, excessive brightness, dark areas, shadows, or poor uniformity.

Without a proper lighting plan, fixture quantity and spacing can become guesswork, particularly in warehouses, manufacturing facilities, shops, sports facilities, and outdoor areas.

We have worked with customers who needed to modify or replace recently installed lighting systems because the original fixtures or layout did not provide the light levels required for their operations.

For example, an installation producing approximately 15 foot-candles may be inadequate for a task requiring approximately 30 foot-candles. However, the correct target should be established from the actual application, tasks, project requirements, and applicable lighting guidance rather than assuming every warehouse requires the same minimum.

Our complimentary lighting design service evaluates factors such as:

• Room or site dimensions
• Mounting height
• Fixture locations
• Actual fixture IES data
• Target foot-candles
• Uniformity
• Racking and obstructions
• Task areas
• Reflectance assumptions

This provides a much stronger basis for fixture selection than wattage or fixture quantity alone.

Substituting Fixtures After Professional Lighting Design

Lighting plans are calculated using the photometric characteristics of specific fixtures, including lumen output, intensity distribution, optics, mounting orientation, and IES data.

Replacing the specified fixture with another product can change the results even when the substitute has similar wattage or total lumen output.

For example, two 150-watt fixtures may use substantially different optical distributions. One may concentrate more light downward while another distributes light across a broader area. Their average foot-candles, minimum light levels, maximum light levels, uniformity, and coverage can therefore be different.

We have seen projects where customers used a lighting plan but substituted another manufacturer’s fixture afterward and did not achieve the predicted results.

The problem is not necessarily that the substitute fixture is inferior. It may simply have different photometric characteristics from the fixture used in the original design.

If a product substitution is being considered, obtain the replacement fixture’s IES file and rerun the photometric calculation before installation.

Wattage Myths: Why Delivered Lighting Performance Matters

LED fixture efficacy can vary substantially among manufacturers, fixture categories, product generations, CRI options, drivers, optics, and operating conditions.

Two fixtures using the same wattage can produce different lumen outputs and very different lighting distributions.

Wattage alone does not tell you:

• Total lumens
• Luminaire efficacy
• Beam distribution
• Delivered foot-candles
• Uniformity
• Glare
• CRI
• Color temperature

Likewise, total lumens alone do not tell you how effectively a fixture will illuminate the target area.

Professional lighting design focuses on the light delivered to the work plane or target area, along with uniformity and other application requirements. Wattage can then be evaluated as part of the energy-efficiency comparison.

Early Failure Risks in Low-Quality LED Products

LED fixture reliability depends on the complete system rather than the LED chips alone.

Potential causes of premature failure include:

• Driver failure
• Excessive operating temperature
• Inadequate heat dissipation
• Electrical surges
• Moisture or contaminant ingress
• Component quality
• Improper installation
• Operation outside the fixture’s rated environment

Some inexpensive products may experience premature failures, but price alone does not establish expected service life, and it is not accurate to state that bargain fixtures generally fail within a fixed 6-12 month period.

Likewise, a high-quality LED fixture should not automatically be described as providing 50,000+ hours without reviewing its published lumen-maintenance and product-life information.

When comparing products, review:

• Published rated life or lumen-maintenance data
• Driver specifications
• Ambient-temperature rating
• Thermal design
• Surge rating
• Environmental ratings
• Warranty
• Manufacturer history and support

A product with a higher purchase price may provide better long-term value if it offers stronger performance, warranty support, and reliability, but lifecycle cost should be evaluated from the actual products being compared.

Warranty Support and Service Reality

Warranty coverage can be just as important as the warranty duration printed on the specification sheet.

Customers sometimes contact us after having difficulty obtaining replacement products or technical support from their original supplier. When evaluating a lighting supplier, review:

• Warranty duration
• What components are covered
• Labor exclusions
• Environmental exclusions
• Surge-related exclusions
• Required documentation
• Replacement process
• Technical-support availability
• Availability of replacement fixtures or components

Electronic components can fail even in well-designed products. The quality of warranty and technical support can determine how disruptive that failure becomes for the facility.

Why LED Lighting Supply Helps Prevent These Costly Mistakes

LED Lighting Supply helps commercial and industrial customers compare complete lighting solutions rather than relying solely on fixture wattage, advertised equivalency, color temperature, or upfront price.

Our Product Specialists can help review:

• Fixture lumen output
• Luminaire efficacy
• IES photometric performance
• Color temperature
• CRI
• Driver and voltage options
• Controls
• Environmental ratings
• Certifications
• Mounting requirements
• Warranty terms

For projects where fixture quantity, spacing, or light levels matter, our complimentary photometric lighting plans use fixture-specific IES data to calculate predicted foot-candles and distribution before you purchase.

We can also compare existing and proposed system wattage to estimate energy use and potential savings based on the project’s operating schedule and utility rate.

The goal is to select a fixture based on documented performance and application requirements rather than assuming that a particular wattage, CCT, price point, or marketing claim establishes product quality.