Step 1: Determine Lighting Design Criteria

Standards for illumination are set by the Illuminating Engineering Society of North America (IESNA). Illumination is generally measured in the horizontal plane 70 CM above the floor.

Step 2: Record Architectural Conditions and Constraints

Record the architectural conditions that may control or affect lighting design decisions. The two conditions that most frequently affect lighting design are window location and size and the availability and size of plenum space. It is not uncommon for the structural system and/or its materials, ceiling heights, partition construction and/or materials, ceiling systems and their materials, and finish materials to have significant influence on lighting design solutions.

Step 3: Determine Visual Functions and Tasks to Be Served

Following are two ways to determine visual functions and tasks. In the case of a residential dining room, the primary visual task is the dining table, where seeing the food on the table and the faces of other diners is the first priority. An additional need is to see the items on a buffet when it is used as a serving station; third, a painting on a wall deserves accent lighting. While the corners of a residential dining room may not be lighted, a typical room of this size does not require perimeter lighting, assuming the luminaire(s) for lighting the table is selected to throw off adequate peripheral light.

Step 4: Select Lighting Systems to be Used

The basic elements of a lighting design solution are identified at this point in the process. Consideration should be given to all of the appropriate options for the case at hand. The location of the light source is critical. Should light come from above or at eye level (or occasionally from below)? Should the light be directed or diffuse? Should the light source be visible or hidden? The architectural
conditions and constraints described in Step 2 often affect these decisions due to lack of plenum space, available ceiling height, or difficulty in getting power to particular locations.

Step 5: Select Luminaire and Lamp Types

Based on the lighting systems decisions made in Step 4, select luminaire and lamp types. The details of luminaire construction, shape, and dimension must produce the desired direction and concentration of light as well as fit the details of construction type and the materials with which they are to be integrated.

Step 6: Determine Number and Location of Luminaires

The most important element of this part of the lighting design process is getting light where it is needed for the visual functions performed in the space

Step 7: Place Switching and Other Control Devices

This step in the lighting design process is primarily one of logic and common sense. User traffic paths, room usage, and user convenience should be your guides to good switching and control systems

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