Data functions: Hold, max/min, and relative measurement for flexible data tracking and comparison. accuracy: ±4% accuracy up to 10,000 Lux; ±5% accuracy beyond 10,000 Lux. Detachable sensor: Detachable sensor head enables access to hardtoreach spots and awkward angles. Wide range and precision: Measures 1 to 400,000 Lux with 0.1 Lux resolution for precise readings across indoor and outdoor lighting. Practical benefits: Delivers reliable readings to support lighting design, plant growth management, photography exposure, and preservation environments without guesswork. Use scenarios: Greenhouse or grow room: Monitor light levels to optimize plant growth and schedule supplemental lighting. Photography or video shoots: Verify scene illumination and maintain consistent exposure across shoots. Art, archive, or museum spaces: Track lux exposure to protect sensitive works and ensure compliance with lighting guidelines. Design note: The instrument emphasizes functional measurement performance with a detachable sensor to extend reach and measurement versatility in challenging setups.