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Specialty and Architectural Lighting — HID & Metal Halide

How to Evaluate LED vs. HID Horticulture Lighting

How to Evaluate LED vs. HID Horticulture Lighting

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A 2018 study by the Lighting Research Center (LRC) at Rensallear Polytechnic provides detailed guidelines for comparing LED and HID light sources for use in commercial greenhouse and other horticulture facilities. The report is also a cautionary advisory on transitioning to LED based only on the criteria of improved energy efficiency and longer lamp life compared to HID. Scope of LRC Study Commercial environmentally-controlled greenhouses in the U.S. account for nearly 900 million square feet...

What to Know About Mercury in Fluorescent, Ultraviolet, and HID Bulbs

What to Know About Mercury in Fluorescent, Ultraviolet, and HID Bulbs

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Reasonable care should be taken in both the handling of broken light bulbs and the disposal of burned out bulbs that contain mercury. For decades, fluorescent and CFL bulbs have been used widely in commercial and residential general lighting settings, but there has been a vast increase in homeowners, businesses, and institutions utilizing ultraviolet bulbs to purify air and sanitize surfaces due to the COVID-19 situation. Fluorescent tubes, compact fluorescent, UVC germicidal, UVA blacklight, metal...

Comparing Fluorescent vs. Metal Halide Aquarium Bulbs

Comparing Fluorescent vs. Metal Halide Aquarium Bulbs

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Lighting for aquariums is an incredibly complicated task. Too little light can endanger plant and fish life and growth, while too much light can lead to a high rate of algae growth. There is also a heat factor, in too much heat can kill fish and plants. Aquarium owners will often combine several types of light sources to achieve the spectrum and intensity of light they are trying to achieve. Traditionally, fluorescent and metal halide...

High Bay LED Lamp Retrofit: Case Study Demonstrates Benefits

High Bay LED Lamp Retrofit: Case Study Demonstrates Benefits

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High bay fixtures that use metal halide lamps are common in warehouses, shops, sports facilities and big box retail stores. Wattages for metal halide lamps in these applications typically range from 175 watts to 400 watts. Manufacturers are, in 2020, many generations into their lines of LED lamps designed to replace high wattage metal halide. The wattage for equivalent illumination from LED lamps designed for high bay is generally in the range of 50 watts...

LED Lighting and Power Quality: The High Cost of Ignoring Power Quality Issues When Switching to LED

LED Lighting and Power Quality: The High Cost of Ignoring Power Quality Issues When Switching to LED

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The effects of power quality on LED lighting performance generally receive little attention prior to installation for most commercial building applications. Power quality issues such as dips, harmonics, interruptions, transients and surges can result in expensive, early replacement of damaged or failed LED lighting equipment. While facility managers involved with smaller commercial projects may be able to ignore power quality without much consequence, larger industrial LED lighting projects, such as the replacement of existing HID...

Evaluating an LED Retrofit of HID High Bay Fixtures in a Maintenance Facility

Evaluating an LED Retrofit of HID High Bay Fixtures in a Maintenance Facility

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The Lighting Research Center (LRC) at Rensselaer Polytechnic Institute has conducted a field research project evaluating installation issues and performance of a high bay retrofit where the existing metal halide bulbs have been changed to LED. High bay fixtures that use metal halide lamps in warehouses, shops, sports facilities and big box retail offer an opportunity for significant energy savings with LED HID replacement lamps. The high wattages for metal halide range from 175 watts...

Replacing HID with LED in High Bay Applications Offers Potential Benefits But Requires Careful Analysis

Replacing HID with LED in High Bay Applications Offers Potential Benefits But Requires Careful Analysis

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Learn about the benefits and considerations of switching from metal halide and HID lighting systems to LED. While the energy savings and maintenance costs are better with LED HID replacements, does the technology live up to the promises of LED lighting manufacturers?