31EE - SIGN PROGRAM 909 N GRAND - Laserfiche WebLink

Home Browse Search

August 26, 2013 City of Santa Ana 20 Civic Center Plaza Santa Ana, CA 92701 Re: Lighting Analysis and Explanation for Proposed On- Premise LED Sign at We Suzuki Depot in Santa Ana, GA To Whom This May Concern: The following letter and accompanying graph pertains to the Daktranics Galaxy Pro proposed for installation by Electra- Vision Advertising Corporation at Kla Suzuki Depot located at 909 N. Grand Avenue in Santa Ana. We hope you find the following Information beneficial. The accompanying graph depicts illumination levels that the proposed display will produce based on nighttime running levels. These nighttime levels are based on a worst -case scenario of an all -white display. Actual levels will be much lower than what is represented on the graph, as typical content runs at 25 to 35 percent of the brightness of an all-white display. Also, the highest illumination level produced 600 feat away frc m the signs .tip? foot candles This level is only 4% of the light from a single wax candle, and most foot candle measuring devices are unable to even record a level that low. Levels at distances and angles beyond are either nonexistent or so low a foot candle meter wouldn't be able to record a level. Therefore, the residential areas across Santa Ana Freeway and to the south of the proposed sign location, which are furtherthan 600 feet away from the sign, would see an extremely low, immeasurable amount of light from the sign. Most Importantly and as alluded to above, the graph assumes absolute darkness with regard to ambient light. In other words the light from the adjacent roadways is not taken Into account, nor are lightsfrom parking lots, streets, the moon, etc. The presence of any of these ambient light factorsfurther reducesthe measurable light from the proposed display. For example, the Illuminating Engineering Society of North America standards (as compiled by the International Dark Sky Association) for outdoor illumination dictate that average lighting formajor roads should be 1.3foot candles. When considering the light from the digital sign itself is only creating at most 0.28 foot candles (at a distance of 200 feet and zero degrees from the center of the display) at its highest illumination on the roadway, the light from said display would be absorbed by the lightfrom the Santa Ana Freeway and neighboring industrial /commercial properties, located to the west and south of the proposed sign location. Daktronics, Inc. is committed to providing LED displays that adhere to the regulatory environment, working closely with our customers for a responsible approach to the market. Please let me know if you have any questions or concerns. Sincerely, Daktronics, Inc. 31 EE -31 DAKTRONIOS