Transcription of Flicker: How to Avoid It, Test for It, and Fix It
{{id}} {{{paragraph}}}
Example: tourism industry
Flicker: How to Avoid It, Test for It, and Fix It
May 9, 2018 1 Flicker: How to Avoid it, test for it, and fix it Naomi Johnson Miller, FIES, FIALD, LC Pacific Northwest National Laboratory LightFair, DOE Booth, Chicago IL, May 2018 What is Flicker? CIE vs. IEEE CIE e-ILV: Temporal light artifact (TLA): an undesired change in visual perception induced by a light stimulus (Temporal Light Modulation, TLM) whose luminance or spectral distribution fluctuates with time Flicker: Perception of visual for a static observer in a static environment. Up to 3 - ~80 Hz Stroboscopic effect: change of motion for a static observer in a non-static environment ~80 Hz - ~2000 Hz Phantom Array effect (ghost effect): change in perceived shape or spatial layout of for a non-static observer in an otherwise static environment ( saccade, normal head movement, or while driving) ~80 Hz ~2500 Hz IEEE 1789-2015: Variations in luminance over time (temporal modulation of light) Encompasses all of the above effects Includes visual and non-visual effects, as measured by ( ) EEG testing 2 Image: What does flicker (TLA) look
Source: IES Lighting Handbook, 10th Edition • Percent Flicker = A B • Percent Flicker ≠ 100% • Flicker Index = A B x +-100 % x A-B Area 1 Area 1+Area 2. Flicker metrics over time (Thanks Jim Gaines & NEMA!) 11 IEC 61000-4-15
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document:
Related search queries
GalleonTM LED Area and Site Luminaire, Cooper Industries, LED Area and Site Luminaire, Lighting Handbook 10th Edition, Site Lighting Design Criteria Draft –, Lighting, Lighting Handbook, 10th Edition, Site Lighting Design Criteria Draft – May, The Lighting Handbook, Edition, Consequences of Current Design Practices, Lighting Handbook, Illuminance selection, ARRI LIGHTING HANDBOOK, Handbook, Outdoor Lighting Code Handbook, General Lighting Recommendations, IES Footcandle Recommendations