Articles that Enrich and Expand on Physical Security Technologies

Security Lighting Glossary and Acronyms

AHJ – Authority Having Jurisdiction
CCT – Correlated Color Temperature
CCVE – Closed Circuit Video Equipment
CIE – Commission internationale de l’éclairage (International Commission on Illumination)
CPTED – Crime Prevention Through Environmental Design
CRI – Color Rending Index
FSA&A – Facility Security Assessment and Authorization
IR – Infrared
LED – Light Emitting Diode
PoE – Power over Ethernet
SI – Système international (d’unités) – (International System of Units)
TRA – Threat and Risk Assessment
UPS – Uninterruptible Power Supply

Correlated Color Temperature

The correlated color temperature measures light source color appearance defined by the proximity to the blackbody locus as one number. This single measurement can be used instead of or in addition to two measurements required for chromaticity coordinates.

Color Rendering Index

CRI is a mathematically calculated value that measures how well an object’s color will be reproduced against the reference illuminant.


The total luminous flux incident on a surface.


SI unit of luminous flux equal to one candela/steradian


A complete electrical lighting unit including electrical parts and wiring.


SI unit equal to one lumen/m2

Facility Security Assessment and Authorization

The process of reviewing and validating the facility security components at each stage of a project.

Uniformity Ratio

The ratio of the minimum lux reading over the average of all lux readings. A measure of the uniformity of illumination.

Uninterruptible Power Supply

An electrical apparatus that provides emergency power to a load when the primary power source fails (for security lighting, as an example). They may use batteries or a flywheel as the emergency power source.

Senstar LM100: Perimeter Intrusion Detection and Deterrence System

Combining two key security functions in one cutting-edge product, the Senstar LM100 acts as a powerful deterrent against intruders, detecting and illuminating them at the fence line while alerting the site’s security system.

Learn More About Senstar LM100

Posted in: Perimeter Security Info