I want to change my driveway dusk till dawn flood light. Does anyone know which is better to use,Mercury Vapor,Metal Halide or High pressure sodium for cost and Illumination?
How much area are you trying to illuminate? Are you in the country? If not, how will your neighbors feel about the constant glow from your yard?
Any advice given here is general in nature and is not necessarily valid for your given area. If in doubt check with your local codes enforcement department for what is required when doing electrical, plumbing or structural work on your house. Permits may or may not be required in your area and home owners may not be able to DIY some tasks. I have no way of knowing if you have the skills needed to complete the tasks you are asking about, when in doubt seek professional assistance.
My advice may be worth exactly what you pay me for it. :-) For the record I did not stay in a Holiday Inn Express last night.
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