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  • Home
  • Lighting Products
  • Lighting Applications
    • New Construction Can Light (Down Light + Can Housing)
    • RGB Lighting & Smart Controls
    • Decorative Pendants and Wall Sconces
    • Architectural Linear Fixtures
    • Cove, Indirect, Under Cabinet Lighting
    • Green Wall Lighting
      • Projects and Products
      • Green Wall Lighting Design Case Study
      • Green Wall Basics
    • Troffer Retrofit Kits
    • Exterior Lightscaping
    • Black Light Lighting
    • High Efficiency Linear Fixtures
    • Specialty LED/Laser Products
    • Horticulture LED Lighting
      • Horticulture Lighting Basics
      • Horticulture LED Products
    • Commercial Lighting
    • Industrial LED Lighting
    • Residential LED Lighting
  • Lighting Projects
    • Recent Projects
    • 2017 Projects
    • 2016 Projects
    • 2015 Projects
    • 2014 and Earlier Projects
  • About SST
    • Company Profile
    • Our Technology
    • Contact Us
    • News
    • Timeline
  • Blog Post
  • Resources
    • Glossary of LED Terms
    • Other LED Info
    • Product Catalog

Frequently Asked Questions

Home Why do some objects look different under LED lights than under conventional lighting?

Why do some objects look different under LED lights than under conventional lighting?

When a person enters a new lighting environment, the pupil in the human eye constricts or dilates as it adjusts to different lighting conditions to allow more or less light into the eye.  Objects can appear different as the amount of light reflected by an object changes.  Changes in an object’s appearance are more pronounced when the percentage of total light entering the eye as reflected by the object changes significantly.

The figure below shows a mechanic’s workshop in a mobile truck store being lit by fluorescent and LED lighting.  As shown in the figure, object’s reflections tend to look clearer under LED lighting than under conventional lighting because:

  • Light emitted by LEDs is more focused and directional than that emitted by conventional lights. A higher percentage of the directional light emitted by LEDs is reflected by objects and enters the pupil.  In contrast, the light emitted by conventional lights is less direct, and a lower percentage of more scattered light emitted is reflected by objects and enters the pupil.
  • Since more indirect (scattered) light emitted by conventional lights goes directly into the human eye, the pupil will constrict to allow less reflected light to enter.

 

Uniformity of LED light

A “Before” being lit by all fluorescent lighting, “After” all LED.  Note that floors, countertops, and various objects look clearer and brighter under LED lighting.

 

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