Fluorescent Wattages & Lumens


Compact Fluorescent Biax (PL-L) & TBX (PL-T, PL-C) Lamps

Note: Exact specs vary per manufacturer. Color temperature and CRI are usually indicated where noted by xxx. For example, 830 indicates 80 CRI @ 3000K. 741 indicates 70 CRI @ 4100K.
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Fluorescent Linear Twin-Socket Bi-pin Lamps

Note: Exact specs vary per manufacturer. Color temperature and CRI are usually indicated where noted by xxx. For example, 830 indicates 80 CRI @ 3000K. 741 indicates 70 CRI @ 4100K.
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LampLengthWattsLumensGeneric Code


Crenshaw’s standard fluorescent dimming systems use a straight 2-wire protocol for leading edge phase control dimming and Philips Advance Mark X dimming ballasts. Many other fluorescent dimming options are available per specification and subject to to ballast availability and heat testing. Dimming technologies include 0-10V (e.g., Philips Advance Mark 7) and 3-wire (e.g., Lutron 3-wire).

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Color Temperature (CCT)

Color temperature is used in lighting to describe the hue of a white light source. This can vary quite widely across lamp technologies, and is typically defined in degrees Kelvin. In practical terms, warm white light, most often used in residential and commercial settings where relaxed ambient lighting is desired, is normally defined by color temperatures of 2400-2700K. Traditional incandescent lamping typically falls within this color temperature range and is known for it’s yellowish hue. As contemporary lighting design has leaned toward clean, bright lighting plans, 3000K-3500K has become the new standard in decorative lighting. These are considered warm or neutral white, and lack the yellowish hue of 2700K. 4100K is often defined as cool white, and most often seen in commercial or workspace applications where productivity and alertness are desired. 5000K-6000K are described as cold white and most often employed in utility applications. They have a bluish cast, and are typically associated with high output, long life lamp sources.

Color Rendering (CRI)

Color rendering refers to the ability of a light source to illuminate an object’s true color, and is independent of color temperature. Sunlight color rendering is used as the reference standard, and as can be observed, spans the spectrum from extremely warm (1800K at sunset) to extremely cold (8000K in deep shade). All other light sources are ranked in comparison along a scale which measures 100 CRI as perfect color rendering. Incandescent and halogen lamps are typically accepted as exhibiting 100 CRI or close to it. Some fluorescent lamps perform below 70 CRI. Certain long-life utility lamping such as high-pressure sodium can exhibit CRI’s below 30. This effect can be seen most readily in greenish skin hues under low-quality fluorescent lighting, or the loss of color differentiation under some utility lighting. Artists, photographers, product display designers, and museum curators are all acutely aware of the importance of color rendering.

The standard color rendering scale, which most published CRI specifications reference, measures only a selection of colors. Other more exacting scales add ranges of the color spectrum for a more complete picture of light quality. Leaders in museum LED lighting technology such as Xicato are working closely with this aspect of color rendering performance.