This article will guide you through the basics of lighting. Explanations of lighting terminologies, types of beam angles, different color temperatures, photometry distributions, IP ratings and dimming methods are discussed here. The detailed content is as below.

1. Lighting Terminologies.
   • LED
   • Luminous Flux
   • Luminous Intensity
   • Illuminance
   • Luminance or Brightness
   • Efficiency / Efficacy
   • Beam Angles
   • Cutoff Angle
   • Color Rendering Index (CRI)
   • Correlated Color Temperature (CCT)
   • Glare
   • UGR (Unified Glare Rating)
   • Photometry
2. IP Ratings.
   • Drivers
   • Power Factor
3. Dimming Methods
   • Phase Dimming
   • 0-10V Dimming
   • DALI Dimming
   • DMX Dimming

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