It seems logical to create superior roadway lighting fixtures, with superior performance, we need to get rid of old prismatic glass refractors. Vertically lamped fixtures can be mounted in a median and serviced from one side. Usually, one fixture can replace two or more cobrahead fixtures used in traditional designs. With an optimized fixture design, one can lower mounting heights and still meet required lighting levels. This type of installation usually has a lower first cost and, because the lighting mandates fewer poles and fixtures, a much lower maintenance cost.
Energy consumption is usually lower, as well.
Now, back to Tennessee. Stansell Electric of Nashville, TN, was the successful contractor through the bid process. People in surrounding residential neighborhoods were pleased with the reduction in stray light. Lighting levels on the roadway were increased, creating a safer highway and a safer intersection. Fewer fixtures and poles were required, substantially reducing anticipated maintenance costs.