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The SYLVANIA Lighting Glossary

A comprehensive list of frequently used Lighting terms

A-G	H-N	O-U	V-Z
A: Accent Lighting Adaptation B: Baffle Ballast Ballast Factor (BF) Beam Angle Beam Spread Brightness C: Candela, (cd) Candlepower Distribution Candlepower Distribution Curve Center beam Candlepower, (CBCP) Chromaticity Coefficient of Utilization (CU) Color Rendering Index (CRI) Correlated Color Temperature (CCT) Current (I) Cut-Off Angle D: Diffuse Lighting Diffuser Direct Glare Direct Lighting Directional Lighting Disability Glare Discomfort Glare E: Efficacy Energy Enhancing Reflections ESCO F: Fenestration Fixture Fluorescent Lamp Footcandle (fc) Frequency G: General Lighting Glare	H: Harmonic Hertz (Hz) HID High Intensity Discharge Lamps I: Illuminance Incandescent Filament Lamp Indirect Lighting L: Lamp Lamp Life Lamp Lumen Depreciation Factor (LLD) LED (Light Emitting Diode) LED Driver LED Package Lens Level of Illumination Light Light Loss Factor (LLF) Light Source Louver Lumen (lm) Lumen Depreciation Lumen Maintenance Luminaire Luminaire Efficiency Luminance (L) Luminance Contrast Luminance Ratio Luminous Flux Lux (lx) M: Matte Surface Modeling N: Nanometer (nm)	P: Power Power Factor Q: Quality of Lighting Quantity of Light R: Reference Ballast Reflectance (rho) Reflected Glare Reflection Reflector Refraction Refractor Resistance (R) S: Shielding Shielding Angle Spectral Power Distribution (SPD) Specular Surface Supplementary Lighting T: Transmission Transmittance	V: Veiling Reflections Visual Comfort Probability (VCP) Visual Field Visual Surround Visual Task Voltage (E) W: Watt (W) Work Plane

For more definitions and details, see IES RP-16, Nomenclature and Definitions for Illuminating Engineering.