Overview
The document provides detailed information about the cal-LIGHT 400 series of calibrated precision lightmeters, designed specifically for use in museums and art galleries. These devices are equipped with features that ensure accurate measurement of ambient illumination, adhering to national standards.

Features

• Calibration certificate traceable to NIST and NRC National Standards.
• Silicon photodiode sensor with human eye response correction.
• Autorange and auto power off functionalities.
• User-friendly operation with user-selectable units.
• Cosine and photopic correction for accurate readings.

Product Variants

• cal-LIGHT 400: Standard model with a price of $395.
• cal-LIGHT 400L: Includes an illuminated LCD display for low-light measurements, priced at $435.
• cal-LIGHT 400F: Offers enhanced user-friendliness and precision, priced at $485.

Specifications

• Measuring range: 0.1 fc or lux to 40,000 fc or lux.
• Accuracy: Intensity linearity at 2%, photopic better than 1.0% of CIE curve, cosine error less than ±1.0% up to ±85° angle.
• Temperature range: Operating from 32° to 130°F, storage from -4° to 160°F.

Calibration and Certification
Each lightmeter is individually calibrated and comes with a certificate ensuring compliance with NIST and NRC standards. The calibration process involves using a standard tungsten source at 2856K.

Target Users

• Art galleries and museums.
• Facility managers, architects, and lighting designers.
• Engineers, contractors, and developers.

Notable Users
Institutions such as the Art Institute of Chicago, The Smithsonian Institute, and the National Museum of American History are among the users of the cal-LIGHT 400 series.

Contact Information
For more details, contact The COOKE Corporation at their Romulus, MI location via phone, fax, or email.