06/25/2003 Env Bd Packet - Laserfiche WebLink

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March 8, 2000 Crested Butte Country Club Mr. Rick Divine P.O. Box 879 Crested Butte, CO 81224 Dear Mr. Devine: YEADON® Fabric Domes Inc. 2845 North Hamline Ave., Suite 100 St. Paul, MN 55113 Toll Free: 800 -4- YEADON Telephone: 651 - 633 -7400 Fax: 651 - 633 -2019 RECEIVED JUN 1 3 2003 CITY OF LINO LAKES Thank you for your call concerning information about the light levels within a dome and the light level immediately adjacent to the dome. As per our discussion, Yeadon recently had the light levels outside of 3 different domes tested. In all 3 cases, the light level inside the dome was measured and the light level outside the dome at varying distances was measured. The light levels inside the 3 domes varied from 40fc (foot candles) to 65fc. The light levels taken outside were done with the meter pointing directly at the dome. This accurately measures any light that may escape from the dome. The results were as follows: Dome 1 was 40fc. inside. Outside within 5' of the dome the light level was just less than ' /Zfc. At 10' the light level dropped to about' /afc. Dome 2 was 45fc. inside and the results were the same as dome 1 Dome 3 was 65fc. inside. The light level outside at 5' from the dome was 'A& and just over 'Mc. at 10'. Your dome will be approximately 50 to 65fc. inside so you will closely match Dome 3. To get an example of how low this light level outside the dome is, you should know that reflective moonlight is about 'Afc. Parking lot and street lights are between 5 and 15fc. A cloudy foggy day is about 900fc. A sunny day is in the thousands. To summarize, the dome will keep nearly 100% of the light inside and not allow any to spill out on the surrounding areas. An example I like to use is if your neighbor's house has the lights on inside and the shades open, light spills out of the window and lights up the immediate area outside. If the neighbor pulls the shade down, you can still see the lights are on in the house but it is not lighting up the area outside the window any more. In Canada Kerr Industrial Park, R.R. #3 Guelph. Ontario, Canada NIH 6H9 Telephone: 519 -821 -9301 Fax: 519 -821 -9010