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2005_0711_Packet
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2005_0711_Packet
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Roseville City Council
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Council Agenda/Packets
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Information Sheet l 39 (July � 998) <br />Pa�e 3 of 4 <br />Light output firom a fix#ure should b� limited �o more than 1 S degarees below the <br />ho�izontal p�ane. Any attempt to �oodlight objects at a distance of more than 4 <br />times the height of the l�ght fzxture creates glare and light trespass, and decreases <br />visibility and safety. <br />There needs �o be a footcandle limit {such as 50 fe for con�enienee s�oa�elgas <br />�tation canopies) to stop this ratcheting war and help impxove visibility at night. <br />Why should SS fc be needed outdoors when less than 50 fc are required indoors? <br />Billboards and signs should be lit from the top down. The practice of ligh�ing <br />biliboards from the bottom up seems to be more for the convenience of the service <br />company than anyone else. Even a casual inspection of bottom-lit billboards <br />reveals that the majoriiy of the light is escaping into the sky. Billboard �ighting <br />can be accomplished from the top down, and with far less light by using fixtures <br />that accura�ely d�rect th� light at the sign face. <br />A good outdoor lighting code or ordinance could help a community save <br />substan�ially (50% or more) on energy use and dollars spent �o operate outdoor <br />lighting. Gities Iike Tucson, Arizona have already demonstrated haw it can be <br />done. The reasons behind ihe regu�ation of outdoor Iighting should be clearly <br />stated in such ordinances. For example: <br />. The improvement of safety by elim�nating glare and pro�iding for a more <br />even illumination <br />• Saving energy by no� wasting light; using light only where and when i� is <br />needed <br />Light levels should be downsized to no more than the IES (I�luminating <br />Eng�neering Society) recommended levels. <br />In March of 1997, from downtown Tuc�on, I obser�ved Comet Hale-Bopp with a <br />20 degree tail magicaily suspended over the palm trees. I remember wishing that I <br />could shaare �his experience with every city mayor and council membe�. The need <br />for a safer environment, energy savings, and improved aesthetics -- while all <br />desirable -- seemed to pale before the magic of this wondrous celestial visitor, <br />Comet Hale-Bopp. With considered thoug�t and planning, any city could offer its <br />citizens such sights, and the many other advantages of good outdoor lighting. <br />John Gilkison <br />http://��vww.darksky.or�/infashts/is139.htm1 6/20/2005 <br />
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