How should the load for show-window lighting be measured?

The load for show-window lighting should be measured horizontally along all sides of the window. This method ensures that the lighting effectively illuminates the entire display area and accounts for the visual impact from various angles. Measuring the load in this manner captures the total surface area that needs to be lit, allowing for even and adequate distribution of light across the entirety of the window display. Proper illumination enhances customer engagement and showcases the merchandise effectively, directly impacting visibility and aesthetic appeal.

The other approaches do not provide as comprehensive an assessment of lighting load. For instance, measuring vertically along the center of the window may not accurately reflect the lighting needs for all products displayed, especially if the window has varying heights or design elements. Using the total wattage of the fixtures alone overlooks how well those fixtures are positioned and angled to light the space effectively. Finally, measuring based on the square footage of the display does not account for the specific lighting design needed to highlight products within the unique layout of the window, nor does it consider how the light's angle impacts its effectiveness.