3nh DOHO H120 Extra-Large Standard Light Booth with Multi-Source Illumination

Overview

The 3nh DOHO H120 Extra-Large Standard Light Booth is an engineered solution for industrial-grade color evaluation under controlled, spectrally accurate illumination conditions. Designed in accordance with ISO 3664:2009 for graphic technology and photography, and aligned with ASTM D1729 (Standard Practice for Visual Appraisal of Colors) and CIE S 002:2018 (CIE Standard Illuminants for Colorimetry), this light booth delivers stable, repeatable, and metrologically traceable viewing environments. Its core functionality relies on six precisely calibrated light sources—D65 (daylight simulator), TL84 (retail store lighting), CWF (cool white fluorescent), F (incandescent tungsten), UV (ultraviolet black light), and TL83 (warm white fluorescent)—each independently controlled and monitored. Unlike conventional booths with analog ballasts or aging phosphor tubes, the H120 employs high-efficiency, low-thermal-output LED-based illumination modules that eliminate warm-up delays, flicker, and spectral drift over time. The absence of active cooling mechanisms reflects a thermally passive architecture, reducing long-term maintenance while ensuring consistent CCT and spectral power distribution (SPD) across operational life.

Key Features

• Real-time digital monitoring of each light source’s cumulative operating hours, total switch cycles, and customizable naming—enabling predictive lamp replacement and audit-ready usage logs.
• Automated, sequential, or user-selected light source switching with synchronized timer-based exposure control—critical for reliable metamerism detection and observer-independent color matching.
• Instant-on operation with zero warm-up delay and no perceptible flicker, supporting rapid comparative assessments in high-throughput QC laboratories and production lines.
• Energy-efficient LED illumination delivering >90 lm/W efficacy and 85% across viewing area).
• Comprehensive international standard coverage: includes both U.S. (ASTM D1729, D1535) and European/ISO-compliant spectra—eliminating need for multiple dedicated booths in multinational supply chains.
• Modular light engine design allows firmware-upgradable spectral profiles and future expansion to additional standards (e.g., Horizon A, LED B, or custom SPDs) via software configuration.

Sample Compatibility & Compliance

The H120 accommodates large-format samples up to 1286 mm wide, 591 mm deep, and 590 mm tall—ideal for automotive trim panels, architectural cladding, textile rolls, printed signage, and packaging prototypes. Its matte-white interior (Munsell N9.5 reflectance) minimizes stray light and ensures diffuse, shadow-free illumination. All light sources are validated against CIE 15:2018 spectral tolerance bands and maintain chromaticity coordinates within ±0.002 Δuv of target points under continuous operation. The unit complies with IEC 61000-3-2 (harmonic current emissions) and IEC 61000-4-3 (radiated immunity), and supports GLP/GMP documentation workflows through optional CSV export of session metadata (timestamp, source ID, duration, operator ID).

Software & Data Management

While the H120 operates as a standalone hardware platform, its embedded controller supports RS-232 and USB-C connectivity for integration into centralized lab management systems. Firmware updates and light source configuration are performed via secure, signed binary uploads. Session logs—including source activation history, dwell times, and manual annotations—are stored internally for ≥12 months and exportable in timestamped, ISO 8601–formatted CSV files. Optional API access enables synchronization with LIMS platforms compliant with ASTM E1578 (Laboratory Information Management Systems) and supports 21 CFR Part 11–compliant electronic signatures when deployed with validated authentication modules.

Applications

This light booth serves critical roles across quality assurance, R&D, and regulatory submission workflows: textile and apparel color approval against AATCC TM150 and ISO 105-J03; paint and coating batch verification per ASTM D2244 and ISO 12048; plastic component matching in automotive Tier-1 supplier audits; print proofing validation per ISO 12647-2; and medical device packaging color consistency checks under FDA guidance for visual inspection protocols. Its large internal volume also facilitates side-by-side comparison of multi-material assemblies—such as dashboard clusters with mixed polymer, metal, and coated surfaces—under identical angular and spectral conditions.

FAQ

Does the H120 meet ISO 3664:2009 requirements for graphic arts viewing?
Yes—the D65, TL84, and CWF sources are certified to ISO 3664:2009 Class 1 tolerances for spectral irradiance, illuminance level (2000 ± 500 lx), and uniformity.
Can the light sources be calibrated or recertified in-field?
No—calibration is factory-performed using NIST-traceable spectroradiometers; however, annual verification kits (including reference tiles and spectral checklist templates) are available for user-level performance validation.
Is UV source output stable over time?
Yes—UV LEDs are rated for 10,000 hours at >90% initial radiant flux, with integrated thermal derating to maintain peak wavelength stability (365 ± 5 nm) across ambient temperatures from 15°C to 30°C.
What is the warranty coverage?
Standard 24-month parts-and-labor warranty; extended service plans include biannual spectral verification and firmware lifecycle support.
Can the H120 be integrated into automated color measurement workflows?
Yes—via TTL-triggered shutter control and synchronized capture signals compatible with spectrophotometers (e.g., Konica Minolta CM-700d, X-Rite Ci7800) and imaging colorimeters.