T-Lab GrafeLux LED Standard Tube - T-Lab | X-Rite 4★ Color Laboratory | pressSIGN Asia Distributor | Color Management Solutions
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T-Lab GrafeLux LED Standard Tube
T-Lab GrafeLux LED Standard Tube
NEW 🌐 We are currently looking for regional co-operative distributors
D50 LED Lighting for Professional Color Evaluation
Experience daylight-accurate lighting with the GrafeLux standard LED tube, developed and meticulously overseen by T-Lab. Engineered to meet international D50 standards, this high-CRI light source recreates a neutral, natural daylight environment for reliable visual color assessment—resolving the common issues of color shift and distortion under varying lighting conditions.
- 2 ft (60 cm)
- 4 ft (120 cm)
Only under truly neutral and standardized lighting can color be observed in its authentic form. GrafeLux was born to serve this need—enabling visual professionals to see color as it really is.
Utilizing an internationally certified D50 high-CRI LED source, GrafeLux reconstructs the ideal viewing environment for color-critical tasks. It eliminates distortions caused by inconsistent light, creating a stable and trustworthy foundation for design, photography, printing, and any other color-sensitive workflow. Each beam is precisely calibrated to meet professional demands, ensuring your work reflects its truest intent.
This isn’t just illumination—it’s a commitment to accuracy and a safeguard for creativity. When you turn on GrafeLux, you open a window to the world’s truest colors.
Preserving the True Nature of Color
Most Color Errors Are Caused by Metamerism
Metamerism refers to the phenomenon where two colors appear the same under one light source but different under another—or vice versa. This can seriously compromise the accuracy of press checks, studio lighting, and visual design approvals.
GrafeLux combats this issue with:
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Precision spectral distribution
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Stable correlated color temperature (CCT)
Together, these ensure consistent perception and reduce the risk of costly color mismatches throughout your workflow.
Color temperature describes the tone of the light—cool or warm—and dramatically impacts how colors appear. Even the same object may shift in hue under different CCTs.
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CRI (Color Rendering Index) measures how faithfully a light source renders colors. A high CRI (like D50) means what you see is closer to how it appears in natural daylight.
Why Metamerism Happens
Why Choose D50 & Why High CRI Matters?
D50 (5000K) is the ISO 3664 standard light source for graphic arts and image color evaluation. Designed to emulate natural midday light, D50 offers a neutral, balanced environment that enables consistent and accurate color judgment across devices and materials.
The adoption of D50 began in photography for reliable color correction, and naturally extended into printing—ensuring seamless color accuracy from image capture to final production.
In simple terms, CRI (Color Rendering Index) tells you how true a color looks under a given light source. GrafeLux delivers CRI 95+, meaning colors appear nearly identical to how they look under natural daylight—ideal for tasks requiring absolute color fidelity.
– See Color as It Truly Is –
GrafeLux: The Standard LED Tube for Color Accuracy
In printing, photography, design, and digital imaging, color isn’t just a visual impression—it’s a language. Errors in lighting lead to misjudged colors, discrepancies between screen and print, and inconsistent results.
With GrafeLux’s high-CRI D50 light, you restore a true standard viewing condition, allowing every color decision to be made with confidence and clarity.
This product is developed, designed, and quality-assured by T-Lab.
🌐 We are currently looking for regional co-operative distributors.
Mechanical & Socket Specifications
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Tube Size: T8 (Ø26 mm), Length: 57.9 cm (2 ft), 119.8 cm (4 ft)
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Socket Type: G13 bi-pin (both ends)
Electrical Performance
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Input Voltage & Frequency: AC 100–240V, 50/60 Hz
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Rated Power Consumption: 12W (2 ft), 21W (4 ft)
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Power Factor (PF): > 0.9
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Total Harmonic Distortion (THD): ≈ 25%
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Energy Efficiency (Luminous Efficacy): ≈ 90 lm/W
Optical Performance
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Luminous Flux: 1,000 lm (2 ft), 2,000 lm (4 ft) min.
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Correlated Color Temperature (CCT): 5000K
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Color Rendering Index (CRI): Ra > 95
Photobiological Safety
• Blue Light Hazard: No blue light risk (Compliant with safety standards)
Environmental Conditions & Lifetime
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Operating Temperature: -20°C to +60°C
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Lifetime Rating: L50 ≥ 20,000 hours
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Warranty: 1 year
Mandatory Certifications & Labels (for future official sale)
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BSMI / CNS Safety Mark
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CNS 16027 (LED Light Source Category)
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CNS 61347-2-13 (Control Gear for LED Modules)
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BSMI Certification Number: R64023
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RoHS Compliant (Taiwan Ministry of Economic Affairs)
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EMC Compliance: Meets CNS 13438 / CNS 14336-1 standards for EMI/EMC
Professional-Grade D50 Standard Viewing Light
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CCT (Correlated Colour Temperature): 5000K ± 200K, aligned with CIE D50
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Spectral Power Distribution (SPD): Matches ISO 3664:2009 standard D50 curve (380–730 nm)
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Chromaticity Coordinates (10° observer): x ≈ 0.3457, y ≈ 0.3585, max tolerance ± 0.01 (based on LED standards)
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Color Rendering Performance (CRI Ra): Ra ≥ 95
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Metamerism Index: Mi_vis < 1.0; Mi_uv (data currently unavailable)
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Maintenance & Replacement:
For regular purpose: 15000-20000 hours
For standard viewing booth: Recommended to replace after 2,000 hours of use to maintain stable color temperature and spectral fidelity
