High Temperature LED Lights
- Survive extreme heat up to 392°F for 5+ years of operation
- Cut energy costs by 50%-70% compared to metal halide fixtures
- Reduce maintenance downtime with heat-resistant, industrial-grade components
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Thermal-Resistant Layout Design for Extreme Heat Environments & Equipment Clearances
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Heat-Rated Fixture Selection & Thermal Management Calculations for Your Temperature Range
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Eliminate Frequent Bulb Replacements & Reduce Downtime in High-Heat Applications
LED High Temperature Lights for Industrial Applications are specifically designed to withstand extreme heat environments, making them ideal for facilities such as steel mills, foundries, and power plants. These robust fixtures are engineered to operate efficiently in ambient temperatures up to 392°F (200°C), ensuring durability and reliability where conventional lighting would fail.
Commonly installed in areas like aluminum smelting facilities, glass manufacturing operations, and other industrial settings, these lights are available in various form factors, including high bay and linear configurations, to suit different spatial layouts. As part of our Commercial & Industrial Lighting Solutions, these high-temperature LED lights are essential for maintaining consistent illumination in challenging environments.
Showing 16–27 of 27 results
SKU:LLS-LS-HB-HT100-200-5-90 | Web ID:2602Built to Order 8 Weeks- Lumens: 30000
- Replaces: 400 Watt Metal Halide
- Color Temp: 5000K
- CRI: 70+
- IP Rating: IP66
- Rated Life: 50,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 90°
- Beam Angle (Opt): 25° | 40° | 60°
- Mount: Eye-Hook | Pendant | Trunnion
- Dimensions (in): 24 x 22.4 x 4.3 Inches
- Weight (lbs): 40 lbs
Starting At$2,258.27
- SKU:LLS-LS-HB-HT100-300-5-90 | Web ID:2330Built to Order 8 Weeks
- Lumens: 45000
- Replaces: 1000 Watt Metal Halide
- Color Temp: 5000K
- CRI: 70+
- IP Rating: IP66
- Rated Life: 100,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 90°
- Beam Angle (Opt): 25° | 40° | 60°
- Mount: Eye-Hook | Pendant | Trunnion
- Dimensions (in): 22 X 19 X 4 in
- Weight (lbs): 38 lbs
Starting At$3,108.65 - SKU:LLS-LS-HB-HT150-50-50 | Web ID:2165Built to Order 8 Weeks
- Lumens: 7500
- Replaces: 250 Watt Metal Halide
- Color Temp: 5000K
- CRI: 75+
- IP Rating: IP66
- Rated Life: 100,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 120°
- Mount: Pendant
- Dimensions (in): 12 x 10.5 x 2.5 in
- Weight (lbs): 11 lbs
Starting At$1,071.91 - SKU:LLS-LS-HB-HT150-100-50 | Web ID:2166Built to Order 8 Weeks
- Lumens: 15000
- Replaces: 400 Watt Metal Halide
- Color Temp: 5000K
- CRI: 75+
- IP Rating: IP66
- Rated Life: 100,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 120°
- Mount: Pendant
- Dimensions (in): 14 X 12 X 4 in
- Weight (lbs): 16 lbs
Starting At$1,808.18 - SKU:LLS-LS-HB-HT150-150-50 | Web ID:2167Built to Order 8 Weeks
- Lumens: 22500
- Replaces: 400 Watt Metal Halide
- Color Temp: 5000K
- CRI: 75+
- IP Rating: IP66
- Rated Life: 100,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 120°
- Mount: Pendant
- Dimensions (in): 22 X 12 X4 in
- Weight (lbs): 25 lbs
Starting At$2,571.55 - SKU:LLS-LS-HB-HT150-200-50 | Web ID:2168Built to Order 8 Weeks
- Lumens: 30000
- Replaces: 400 Watt Metal Halide
- Color Temp: 5000K
- CRI: 75+
- IP Rating: IP66
- Rated Life: 100,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 120°
- Mount: Pendant
- Dimensions (in): 22 X 19 X4 in
- Weight (lbs): 38 lbs
Starting At$3,321.36 - SKU:LLS-LS-HB-HT200-50-50 | Web ID:2573Built to Order 8 Weeks
- Lumens: 7500
- Replaces: 250 Watt Metal Halide
- Color Temp: 5000K
- CRI: 75+
- IP Rating: IP66
- Rated Life: 100,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 120°
- Mount: Pendant
- Dimensions (in): 12.2 x 16.9 x 2.3 in
- Weight (lbs): 15.4 lbs
Starting At$1,789.82 - SKU:LLS-LS-HB-HT200-100-50 | Web ID:2578Built to Order 8 Weeks
- Lumens: 15000
- Replaces: 250 Watt Metal Halide
- Color Temp: 5000K
- CRI: 75+
- IP Rating: IP66
- Rated Life: 100,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 120°
- Mount: Pendant
- Dimensions (in): 24 x 19.7 x 2.3 in
- Weight (lbs): 33 lbs
Starting At$3,230.45 - SKU:MLLG-E-LED-EXPLB-80-50-C1D2-HT | Web ID:2302Built to Order 8 Weeks
- Lumens: 8000
- Replaces: 250 Watt Metal Halide
- Color Temp: 5000K
- CRI: 70+
- IP Rating: IP66
- Rated Life: 50,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 120°
- Mount: Yoke | 3/4 in NPT Pendant
- Dimensions (in): 9.1 X 8.7 in
- Weight (lbs): 15 lbs
Starting At$880.70 - SKU:MLLG-E-LED-EXPLB-100-50-C1D2-HT | Web ID:2303Built to Order 8 Weeks
- Lumens: 10000
- Replaces: 400 Watt Metal Halide
- Color Temp: 5000K
- CRI: 70+
- IP Rating: IP66
- Rated Life: 50,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 120°
- Beam Angle (Opt): 40° | 60° | 90°
- Mount: Yoke | 3/4 in NPT Pendant
- Dimensions (in): 14 in D X 11.3 in H
- Weight (lbs): 26 lbs
Starting At$965.40 - SKU:MLLG-E-LED-EXPLC-80-50-C1D1-HT | Web ID:2305Built to Order 8 Weeks
- Lumens: 8000
- Replaces: 250 Watt Metal Halide
- Color Temp: 5000K
- CRI: 70+
- IP Rating: IP66
- Rated Life: 50,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 120°
- Mount: Yoke | 3/4 in NPT Pendant
- Dimensions (in): 16 X 13.5 in
- Weight (lbs): 39 lbs
Starting At$1,462.20 - SKU:MLLG-E-LED-EXPLC-100-50-C1D1-HT | Web ID:2306Built to Order 8 Weeks
- Lumens: 10000
- Replaces: 400 Watt Metal Halide
- Color Temp: 5000K
- CRI: 70+
- IP Rating: IP66
- Rated Life: 50,000 (L70) hours
- Dimmable: No
- Beam Angle (Std): 120°
- Mount: Yoke | 3/4 in NPT Pendant
- Dimensions (in): 16 X 13.5 in
- Weight (lbs): 39 lbs
Starting At$1,492.00
What Are Industrial LED High Temperature Lights
Standard LED fixtures can fail prematurely when ambient temperatures exceed their operating limits. High temperature LED lights are engineered for industrial environments where sustained heat, radiant heat, poor airflow, dust, vibration, moisture, or other harsh conditions can damage conventional lighting.
These fixtures use heat-resistant components, thermal management systems, durable housings, and specialized driver designs to operate in elevated ambient temperatures ranging from 176°F / 80°C to 392°F / 200°C, depending on model. Some high-temperature fixtures also support remote driver installation, which keeps sensitive electrical components away from the hottest areas.
High temperature LED lights are commonly used in steel mills, foundries, power plants, aluminum smelting facilities, glass manufacturing plants, kilns, industrial ovens, pulp and paper mills, boiler rooms, and other heat-intensive industrial environments where standard fixtures are not suitable.
Selection and Installation Note: Product specifications, ratings, controls, certifications, and warranty coverage vary by model. Confirm the selected product specification before ordering. For code-sensitive, electrical, emergency, hazardous-location, or safety-critical applications, verify requirements with your local inspector or a licensed electrical professional.
Recommended Foot-Candles for High Temperature Industrial Lighting
Use the tool below to find general starting foot-candle ranges for high-temperature applications. The widget helps estimate light levels for steel mills, foundries, turbine halls, boiler rooms, glass manufacturing, aluminum smelting, kilns, industrial ovens, pulp and paper mills, high-temperature walkways, and related heat-intensive industrial areas.
Foot-candle guidance helps with light-level planning, but it does not determine whether a fixture is suitable for high ambient temperature, radiant heat, direct thermal plume exposure, remote-driver installation, hazardous-location classification, voltage, corrosion, washdown, vibration, or other environmental requirements.
Step 1: Find your foot candle levels
Step 2: Estimate your fixture count and space
High Temperature Lighting Layout Estimator
Use this estimator to calculate approximate fixture count, spacing, and average foot-candles for hot industrial spaces, manufacturing areas, and high ambient temperature locations using high temperature LED fixtures. Enter your room dimensions, mounting height, target foot-candles, light loss factor, and room light use factor to generate a preliminary lighting layout.
Project Inputs
Estimated Results
Estimated average foot-candles are preliminary and should be verified with a lighting plan for project-critical applications.
Room Light Use Factor: Suggested starting points: open warehouse 0.85–0.90, clean light-colored space 0.75–0.85, typical warehouse 0.65–0.75, racked or obstructed space 0.50–0.65, dark or complex space 0.40–0.55.
Photometry / Simulation Note: When usable IES photometry is available for the selected fixture, this estimator uses the fixture’s IES candela data to improve the visual floor-level light distribution. When IES photometry is not available, the estimator uses a simulated beam model based on lumens, mounting height, room light use factor, light loss factor, and beam angle.
Preliminary Estimate Only: This estimator is intended for simple square or rectangular spaces. Actual light levels may vary based on fixture optics, mounting conditions, ceiling height, surface reflectance, obstructions, controls, voltage, installation conditions, and site-specific requirements.
This estimate is a starting point. Warehouses, industrial facilities, hazardous locations, sports areas, schools, healthcare spaces, public areas, and code-sensitive projects may require a reviewed lighting layout before purchase or installation.
When High Temperature LED Lights Are the Right Fit
High temperature LED fixtures are used when standard commercial or industrial LED fixtures cannot safely or reliably operate at the fixture location. They are especially useful in hot industrial spaces where lighting failures create maintenance problems, downtime, access issues, or visibility concerns.
| Use High Temperature LED Lights When | Do Not Use Them as a Shortcut When |
|---|---|
| Ambient temperatures exceed standard fixture limits, or existing fixtures fail early because of heat exposure. | The fixture location remains within a standard LED fixture's rated operating range. A standard industrial LED fixture may be more appropriate. |
| The fixture will operate in sustained elevated heat, not just brief or occasional temperature spikes. | The fixture would be mounted directly in a furnace exhaust stream, superheated airflow, or direct thermal plume that exceeds the fixture rating. |
| The environment includes heat plus dust, vibration, moisture, steam, chemicals, or difficult maintenance access. | The area requires explosion proof or hazardous-location lighting and the selected high-temperature fixture does not carry the required hazardous-location certification. |
| The project involves steel mills, foundries, power generation, aluminum smelting, glass manufacturing, kilns, industrial ovens, or boiler areas. | The issue is only low light output, poor spacing, or outdated HID fixtures without a high ambient temperature problem. |
| Maintenance access is limited and heat-related failures are creating recurring service costs. | Rapid thermal cycling, impact, washdown, corrosion, or chemical exposure exceeds what the selected model is designed to handle. |
Waymos Testing Heat Chambers Use High Temperature LED Lighting Case Study
The Backstory of Our Partnership With Waymo
Waymo faced significant challenges achieving consistent, reliable lighting in its thermal chamber areas used for manufacturing and testing self-driving cars. Their Senior Optical Hardware Engineer, David Lu, reached out to LED Lighting Supply to seek consultative support in selecting a high-temperature LED lighting system.
The lighting needed to be suitable for the high-heat areas where they weld on and rigorously test the car sensors, cameras, and internal computers. This testing and QA process ensures reliable operation and durability before daily use. The customer was paired with our Product Specialist, Jeff Cesenaro, for expert guidance.
The Challenge of a High-Heat Environment
Waymo needed an effective lighting solution for a wide range of high-heat environments. The installation area required a more specialized fixture than a typical LED high bay. Our Specialist, Jeff Cesenaro, helped guide the customer in selecting a unique fixture type designed to perform effectively during the welding and testing process without the risk of heat damage. LED Lighting Supply worked with Waymo to understand the operational needs and temperature ranges in the area.
The customer had a key project requirement: delivery in a reasonable timeframe for the project, as choosing a supplier with product expertise, fixtures in stock, and inventory readily available was a top priority
Lighting plan metrics:
- Product(s) Used: MLLG-LS-LED-HB-100-5-90-HT100
Choosing High Temperature Lights by Temperature Rating, Mounting, Driver Location, and Environment
The most important selection factor is the measured temperature at the fixture location. Facility temperature, floor-level temperature, and fixture-level temperature may be very different. Heat stratification, radiant heat, thermal plumes, poor airflow, and nearby process equipment can all affect fixture life.
Select the fixture based on sustained ambient temperature at the mounting location, not only the general facility temperature. Then confirm mounting height, driver location, voltage, environmental exposure, light levels, and whether the area also has hazardous-location requirements.
High Temperature Ratings and Product Types
| Temperature Rating | Best Used For |
|---|---|
| 176°F / 80°C High Temperature LED Lights | General elevated-temperature industrial areas where standard LED fixtures are not suitable, including spaces near ovens, process equipment, hot mechanical rooms, and manufacturing zones with sustained heat. |
| 194°F / 90°C High Temperature LED Lights | Hot industrial spaces, power generation areas, pulp and paper applications, and facilities needing more thermal headroom than a 176°F / 80°C fixture. |
| 212°F / 100°C High Temperature LED Lights | Severe high-heat environments such as turbine halls, boiler rooms, and process areas where temperatures approach or exceed 200°F. |
| 302°F / 150°C High Temperature LED Lights | Extreme industrial applications such as aluminum smelting, glass manufacturing, hot process zones, and areas near furnaces or kilns where elevated ambient temperatures require a higher-rated fixture. |
| 392°F / 200°C High Temperature LED Lights | Severe heat zones, such as steel mills, foundries, electric arc furnace buildings, and other applications requiring fixtures designed for extreme ambient temperatures. Remote driver placement and cable routing must be reviewed carefully. |
| 194°F / 90°C High Temperature Explosion Proof Lights | Classified hazardous locations that also require elevated ambient temperature protection. Always verify the required Class, Division, Group, T Rating, certification, ambient temperature rating, voltage, and installation requirements before ordering. |
Important for 392°F / 200°C fixtures: 392°F / 200°C applications are extreme, model-specific installations. LED drivers are installed remotely away from the fixture and should not be mounted in or near the high-heat source. Confirm continuous operating temperature, lumen output, driver location, cable routing, ambient temperature at the driver location, and installation requirements on the selected product specification before ordering.
Thermal and Installation Planning Checklist
| Planning Step | What to Confirm |
|---|---|
| Measure temperature at the fixture | Confirm the sustained ambient temperature where the fixture will actually be installed. Ceiling-level or equipment-level temperatures can be much higher than floor-level readings. |
| Review radiant heat | Furnaces, molten metal, kilns, boilers, ovens, stacks, turbines, and hot process equipment may create radiant heat that exceeds surrounding air temperature. |
| Avoid thermal plumes | Do not mount fixtures directly in furnace exhaust streams, superheated airflows, or direct thermal plumes that exceed fixture ratings. |
| Confirm driver placement | Remote drivers should be installed away from the high-heat source and within the driver's rated ambient temperature range. |
| Maintain airflow where possible | Hot stagnant air around the fixture housing or heat sink can reduce performance and service life. |
| Check environmental ratings | Dust, steam, moisture, washdown, vibration, chemical exposure, and corrosion may require additional fixture ratings or materials. |
| Verify hazardous-location requirements | If the area is classified, use a fixture with the required hazardous-location certification and confirm the temperature rating separately. |
| Use qualified installers | Installation should follow the product listing, manufacturer instructions, applicable electrical code, and site requirements. |
Nuclear facilities, hazardous locations, and other safety-sensitive environments may require additional documentation, specialized hardware, or project-specific review. Final fixture selection and installation must comply with applicable site requirements and should be performed by qualified, licensed professionals.
High Temperature LED Lights Compared with Standard LED, Explosion Proof, and HID Lighting
High temperature LED lighting is often compared with standard LED fixtures, explosion proof lighting, high temperature explosion proof fixtures, and older metal halide or HID systems. The right choice depends on ambient temperature, hazardous-location classification, mounting height, beam distribution, voltage, and maintenance access.
| Lighting Type | What to Know |
|---|---|
| Standard Industrial LED Fixture | Used where ambient temperatures remain within the fixture's standard operating range. Not intended for sustained high-heat environments beyond the product rating. |
| High Temperature LED Light | Used where elevated ambient temperature or heat exposure would shorten the life of standard LED fixtures. |
| Explosion Proof Light | Used for classified hazardous locations selected by Class, Division, Group, T Rating, certification, and installation environment. Heat rating still needs to be confirmed separately. |
| High Temperature Explosion-Proof Light | Used where both elevated ambient temperature and hazardous-location classification apply. Confirm both the high-temperature rating and the hazardous-location marking. |
| Metal Halide / HID Fixture | Older technology that may require lamp and ballast replacement, warm-up time, and more frequent maintenance. Many high-temperature LED projects replace older HID systems. |
High Temperature Lighting Project Example
Real project examples help show how properly selected high-temperature fixtures can improve visibility and reduce maintenance in hot industrial environments.
Fabric Processing Facility
| Specification | Details |
|---|---|
| Mounting height | 21-37 ft |
| Fixtures used | 150 Watt LED High Temperature Light | 19500 Lumens | Rated to 176°F and 200 Watt LED High Temperature Light | 26000 Lumens | Rated to 176°F |
| Average light level achieved | 47 foot-candles |
| Uniformity | 2.1 |
A photometric plan can help confirm fixture count, placement, expected foot-candle levels, and uniformity before fixtures are ordered. For high-temperature projects, the lighting plan should be reviewed alongside temperature rating, mounting location, driver placement, voltage, environmental exposure, and access requirements.
High Temperature Lighting Certifications and Warranty Support
High temperature LED lights from LED Lighting Supply carry safety listings such as UL, ETL, or CSA, depending on the model. Many models are DLC or DLC Premium listed for utility rebate support where available. Rebate eligibility varies by utility program, fixture model, and project location, so confirm on the selected product specification before ordering.
Most high temperature LED fixtures include a 5-year warranty unless otherwise specified, with USA-based warranty support. Before purchase, confirm the fixture's marked ambient temperature rating, driver temperature limits, environmental ratings, voltage, mounting method, and whether the selected model is suitable for any hazardous-location, washdown, corrosion, vibration, or project-specific requirements.
Common High Temperature Lighting Mistakes
High-temperature lighting mistakes usually happen when the fixture is selected from a general temperature rating without reviewing the actual installation conditions. The correct fixture depends on sustained ambient temperature, radiant heat, airflow, mounting location, environmental exposure, and driver placement.
- Installing standard LEDs in high ambient temperatures: Standard fixtures can fail early when installed outside their rated operating range.
- Using facility temperature instead of fixture-location temperature: Ceiling-level or equipment-level temperatures can be much higher than floor-level measurements.
- Mounting fixtures directly above heat sources: Radiant heat, furnace exhaust, and thermal plumes can exceed the fixture's ambient rating.
- Ignoring remote driver requirements: Extreme-temperature fixtures may require remote drivers installed away from the heat source.
- Assuming maximum temperature means sustained operation: Confirm the product specification includes continuous operating temperature capability.
- Skipping airflow review: Hot stagnant air around the fixture can reduce thermal performance and shorten service life.
- Forgetting dust, steam, moisture, or corrosion: Temperature rating alone does not confirm suitability for harsh industrial exposure.
- Using high-temperature lights where explosion proof fixtures are required: If the area is classified, the fixture must also carry the required hazardous-location rating.
- Installing too few fixtures: Reducing fixture count to limit heat or cost can create poor visibility and unsafe working conditions.
- Skipping a lighting plan: A photometric layout helps confirm fixture count, spacing, mounting height, expected foot-candles, and uniformity before ordering.
Request a photometric lighting plan, and our Product Specialists can help review fixture count, mounting height, light levels, and product specifications for your high-temperature lighting project.
This Content on high temperature lighting guidance, location and high temperature application considerations, and fixture selection content Was Professionally Reviewed By:
Jamie Popp, Professional Electrical Engineer (PE)
Multi-State Licensed Professional Engineer
Master of Science in Engineering
Master of Science in Project Management
Jamie has spent over 15 years working directly with industrial energy systems and facility operations. In his engineering design work, he focuses on comprehensive lighting designs, complex power distribution engineering, technical hazardous area classifications, and design-level construction support.
He applies these specialized design skills across demanding environments, including petrochemical, nuclear, mining, pulp and paper, and manufacturing facilities.
This content was reviewed for technical accuracy, engineering relevance, real-world application, and clarity for the stated lighting topic.
High Temperature LED Lights Frequently Asked Questions
What Are the Key Features of High Temperature LED Lights?
High temperature LED lights are built for industrial areas where heat can shorten the life of standard LED fixtures. Depending on the model, they may include heat-resistant components, thermal management features, durable housings, high-temperature wiring, specialized driver designs, or remote driver options. Temperature rating, IP rating, voltage, controls, certifications, and warranty coverage vary by fixture, so always confirm the selected product specification before ordering.
When Should I Consider Using High Temperature LED Lights?
Consider high temperature LED lights when the measured ambient temperature at the fixture location exceeds the operating range of a standard LED fixture, or when existing fixtures are failing early because of heat exposure. Ceiling-level temperatures, radiant heat, thermal plumes, poor airflow, and nearby ovens, boilers, furnaces, kilns, turbines, or process equipment can all affect fixture life. Select the fixture based on the actual conditions at the mounting location, not only the general room temperature.
What Are the Benefits of Using High Temperature LED Lights?
High temperature LED lights can provide efficient light output, long fixture life, instant-on performance, and reduced maintenance frequency in hot industrial environments when properly selected for the application. Energy savings and service life depend on the existing fixture type, operating hours, ambient temperature, airflow, driver location, controls, and installation conditions. Review the selected product specification for lumen output, wattage, temperature rating, and warranty terms.
How Do High Temperature LED Lights Manage Heat?
High temperature LED fixtures manage heat through model-specific designs such as thermal housings, heat sinks, heat-resistant components, specialized drivers, and remote driver configurations. Some extreme-temperature fixtures place the driver away from the hottest area to help protect sensitive electrical components. Confirm the fixture rating, driver temperature limits, cable routing, and airflow requirements before ordering.
What Applications Are Best Suited for High Temperature LED Lights?
High temperature LED lights are commonly used in steel mills, foundries, power generation areas, aluminum smelting facilities, glass manufacturing, boiler rooms, turbine halls, kilns, industrial ovens, pulp and paper mills, and other heat-intensive environments. Nuclear facilities, hazardous locations, and other safety-sensitive projects may require additional documentation, specialized approvals, or project-specific review before fixtures are selected.
Are There Any Special Considerations for Installing High Temperature LED Lights?
Yes. Measure the sustained ambient temperature at the fixture location and review radiant heat, airflow, mounting height, driver location, voltage, dust, moisture, vibration, corrosion, and maintenance access. Avoid mounting fixtures directly in furnace exhaust streams, superheated airflow, or thermal plumes that exceed the fixture rating. Installation should follow the product listing, manufacturer instructions, applicable electrical code, and site requirements.
What Certifications Do High Temperature LED Lights Have?
Certifications vary by model. Selected high temperature LED fixtures may carry safety listings such as UL, ETL, or CSA, and some models may be DLC or DLC Premium listed for utility rebate programs where available. Always verify the selected fixture's specification sheet, listing, environmental ratings, temperature rating, and rebate eligibility before ordering.
How Can I Determine the Number of High Temperature Lights Needed?
The number of fixtures depends on mounting height, fixture output, beam angle, room dimensions, task requirements, target foot-candles, and required uniformity. A photometric lighting plan can help estimate fixture count, spacing, expected light levels, and layout before ordering. For high-temperature projects, review the lighting plan alongside temperature rating, driver placement, voltage, environmental exposure, and maintenance access.