Accessible Lighting

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Accessible LightingProvision of adequate general lighting and contrasting environmental features so as to highlight them against their background are two essential design features that must be incorporated adequately for persons with vision impairments to use the premises independently and comfortably. Providing adequate accessible lighting for people with visual impairments will normally ensure that the basic needs of all users are met.

Illumination

In order for lighting design to be effective, it should provide adequate illuminance. The relevant recommendations from British
Standard EN 12464-1 and Lighting Guide 5 (produced by Society of Light and Lighting, UK) are as follows:

Area MaintainedLimiting IlluminanceMinimum Glare RatingColour Rendering (Ra)
Entrance halls, Lobby200 lux2280
Reception Desk300 lux1980
Circulation areas,Corridors100 lux2580
Stairs, Ramps150 lux2580
Gymnasium, Swimming Pool300 lux2280
Restaurant, Cafe200 lux2280
Conference Rooms300 lux1980
Business Centre300 lux1980
Computer Workstations300 lux1980
Kitchen500 lux2280

Non uniform lighting creating light and dark patches can be disorienting to persons with vision impairmentsThe following general points should be considered with regard to lighting;

  1. Sudden changes in illuminance should be avoided to prevent adaptation difficulties.
  2. Ensure that stairs, ramps and slopes are lit so that they can easily be identified when approaching in either direction.
  3. Localised lighting for specific tasks may normally be better than increasing the overall illuminance necessary for all tasks in a multi-use area.
  4. Minimum requisite illuminance should be provided and it should be uniform. Care should be taken to minimise glare.
  5. Visibility and comfort are compromised when light fixtures are placed too far apart, creating non-uniform patterns of light and dark on the floor and walls. The areas with non-uniform patterns of light and dark, such as in the adjoining photograph are disorientating for persons with vision impairments.
  6. Just as important as the lighting itself, is the choice of décor and ensuring that there is colour and luminance contrast between different areas, To assist colour discrimination, the colour rendering index of the light source should be at least Ra80, the recommendation for most interiors, and where feasible, lamps of Ra90 should be used.
  7. Most users, including those with visual impairments, prefer natural lighting providing it does not create problems of glare.
  8. Light coloured surfaces have a relatively high reflectance allowing light to flow around a space. Dark surfaces have the opposite effect and redecoration with darker colours can reduce illuminance and luminance. Light and dark surfaces will add interest to a space and may also provide adequate contrast to allow people with visual impairments to identify junctions between surfaces, as shown in the figure on the adjoining photograph.

Summary

ƒƒMaintain adequate and uniform lighting levels as indicated in the following table:

AreaMaintained Illuminance
Entrance halls, Lobby200 lux
Reception Desk300 lux
Circulation areas,Corridors100 lux
Stairs, Ramps150 lux
Gymnasium, Swimming Pool300 lux
Restaurant, Cafe200 lux
Conference Rooms300 lux
Business Centre300 lux
Computer Workstations300 lux
Kitchen500 lux
  • Avoid non-uniform patterns of light and dark on the floors and walls.
  • Avoid direct and reflected glare by selecting appropriate finishes and luminaries.
  • Use lighting to highlight hazards and obstacles in the circulation path.
  • Install luminaries that have a colour rendering index of at least Ra80

 

YOU MAY ALSO LIKE…

  1. Hotel Accessibility Manual – Accessible Parking
  2. Hotel Accessibility Manual – Main Entrance
  3. Hotel Accessibility Manual – Corridors
  4. Hotel Accessibility Manual – Ramps & Handrails
  5. Color and Luminance Contrast – Hotel Accessibility Manual
  6. Accessibility Business Centre and Conference – Hotel Accessibility Manual
  7. Accessiable Restaurant, Bar, Pub and Lounge – Hotel Accessibility Manual
  8. Pool Accessibility, Spa Accessibility and Health Club Accessibility
  9. Accessible Public Restroom Design
  10. Accessible Guest Rooms
  11. Accessible Emergency Egress
  12. Accessible Exterior surfaces and Interior Doors
  13. Accessible Floor Plans
  14. Signage
  15. Accessible Bathroom and Shower Room

Ref :   Universal Design India Principles – ITC Hotels

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