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ProGrade
ProGrade, Certified Electrical Contractor
Category: Electrical
Satisfied Customers: 522
Experience:  28+ years exp. - installation, troubleshooting, & repair of commercial, & residential electrical systems.
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I have a 54W LED Corn bulb that produces 7200 Lumens. I have

Customer Question

I have a 54W LED Corn bulb that produces 7200 Lumens. I have a customer who wants to be able to put their street lights 80-100' apart. The specs we were given from our LED Manufacturer are on this page under the heading Beam angle : http://www.gotitwholesale.com/led-lamps-by-venia-lighting-bulb-led-configure.html
I need to know how high the fixture has to be in order for 2 fixtures to fully cover that span of 80'.
Submitted: 7 months ago.
Category: Electrical
Expert:  ProGrade replied 7 months ago.

Each fixture would need to illuminate half of the distance or 4p feet. According to Lithonia Lighting, the fixture height should be one-half of the distance to to be lighted - a height of 20 feet.

Thank you

http://www.lithonia.com/micro_webs/floodlighting/applications/general_area.htm

Expert:  ProGrade replied 7 months ago.

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