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JUST Normlicht
JUST Normlicht Daylight 5000K proGraphic 59" 58W Fluorescent Light #202883
A 59-inch, 58W fluorescent lamp delivering 5000K D50 light with Ra > 93 and MIvis < 1.0 for ISO 3664:2009 viewing
- Meets ISO 3664:2009 standard for critical color evaluation
- D50 5000K color temperature matches noon daylight precisely
- Ra > 93 color rendering ensures accurate reproduction
- Metamerism index MIvis < 1.0 and MIuv < 1.5 minimizes color shifts
- Reduced mercury content with dimmable operation for flexible use
Precision Lighting for Colour-Critical Work
The JUST Normlicht Daylight 5000K proGraphic is a 59-inch, 58W fluorescent lamp built to meet ISO 3664:2009 for professional viewing environments. It delivers a D50 (CIE) colour temperature of 5000 Kelvin with a high colour rendering index Ra greater than 93. The spectral output includes an enhanced UV component and achieves low metamerism indices below 1.0 (MIvis) and 1.5 (MIuv). Exact 10-degree coordinates are x = 0.3478 and y = 0.3595 with a tolerance of ±0.005.
Suited for Standardised Viewing Systems
This lamp fits JUST standardised viewing devices and serves prepress, press, photography and videography professionals who require verified colour fidelity for critical decisions. The dimmable design allows intensity adjustment to match specific workflow needs. It is not intended for buyers who need a non-standardised light source, those requiring a different colour temperature or illuminant definition, or users without compatible JUST viewing hardware.
Compliance with ISO 3664:2009
The defining specification is full adherence to the ISO 3664:2009 standard, governing colour temperature, rendering, metamerism and UV content for graphic arts viewing. Only a lamp meeting every metric in that standard — CCT, D50, MIvis, MIuv, Ra and chromaticity coordinates — guarantees the consistency required for contract proof evaluation and press matching.
Highlights
- Meets ISO 3664:2009 standard for critical color evaluation
- D50 5000K color temperature matches noon daylight precisely
- Ra > 93 color rendering ensures accurate reproduction
- Metamerism index MIvis < 1.0 and MIuv < 1.5 minimizes color shifts
- Reduced mercury content with dimmable operation for flexible use
Specifications
No published specifications for this item yet.
Questions about this item
Which ISO standard does the 5000K proGraphic 59" 58W lamp meet?
The lamp conforms to ISO 3664:2009, the viewing-condition standard for graphic-arts and prepress workflows.
What physical length and wattage must the fixture accept for this lamp?
It is a 59-inch, 58-watt fluorescent tube designed for JUST Normlicht standardized viewing devices.
How is the lamp installed and what step is often missed?
Insert the tube into the compatible JUST viewing device, then verify the dimmer is set to the calibrated level for D50 simulation.
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