Clear Acrylic Prismatic Ceiling Lighting Panels | 22 1/2" x ...

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Figure 1. ISO-8 cleanroom with flat panel LED lights

Cleanroom lights are special light fixtures that are specially designed so that they do not allow particulates to enter the cleanroom thru the light fixture. Depending on what class the cleanroom light fixture is being used for different features are added.

• Gasket seal on lens
• Gaskets on screws
• Stainless steel screws
• Air tight light fixture assembly
• Painted steel, painted aluminum, and stainless steel housings
• Tear drop light for 100% HEPA coverage ceilings
• Chemical resistance
• Impact resistant lenses
• Flat panel fixture
• Explosion proof fixture
• Colored film filters

The cleanroom industry shifted from fluorescent cleanroom light fixtures to LED (semiconductor Light Emitting Diode) cleanroom light fixtures around .

Figure 2. Fluorescent light fixture

LED cleanroom light fixtures advantages of fluorescent cleanroom light fixtures included:

• 50% lower energy consumption
• Introduce less heat into the cleanroom
• No longer need to replace light tubes
• Eliminated ballast as point of failure
• Equivalent cost by
• Adjustable light strength

Cleanroom LED lights are available in different colors. K, K and K are the most common colors available. The number refers to how warm or cool the color of the light appears.

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• K is warm yellow
• K is neutral white
• K is blue-white color. Small details are visible best at this wavelength. This is the most common LED color for cleanroom lights.

Figure 3. Cleanroom light map

The intensity of cleanroom lights is measured in lumens or footcandles. Typical LED 2x4 flat panel lights deliver anywhere from to lumens. Depending upon the manufacturing or inspection process in cleanroom users typically specify sufficient lumens to achieve 75 to 100 foot candles per square foot.

Figure 4. Amber cleanroom lighting

Semiconductor manufacturers who use photolithography processes use special amber cleanroom lights to avoid wavelengths that can expose the photoresist. Historically, special amber tubes were placed over the fluorescent light bulbs to block the undesirable wavelengths.

Advances in LED technology have allowed manufacture of special LEDs that do not emit the undesirable wavelengths. This eliminates the need for the amber film on cleanroom lights but the film is still used on the windows of these cleanrooms. 

Figure 5. Photography Red cleanroom lighting

Summary: The cleanroom industry transitioned from fluorescent cleanroom lighting to LED cleanroom lighting around . LED cleanroom lights used less power, dissipated less heat, and are similar cost. Important characteristics of LED cleanroom lights include: cleanroom classification, wavelength of light, and intensity.  

Property American Cleanroom Systems

The author Anthony Chien has worked at American Cleanroom Systems for more than 10 years. He has more than 40 years of cleanroom experience. Anthony has a BS and MS in Electrical Engineering specializing in semiconductor manufacturing from the University of Illinois. American Cleanroom Systems is a design build modular cleanroom manufacturer based in Rancho Santa Margarita CA. It is expert in ISO-5 thru ISO-8 (class 100 to class 100k) modular cleanrooms for nutraceutical cleanrooms, pharmaceutical cleanrooms, medical device cleanrooms, and industrial cleanrooms.

Contact us to discuss your requirements of translucent ceiling light panels. Our experienced sales team can help you identify the options that best suit your needs.