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The argument for using projectors for street lighting, is
POWER, you can use mercury lamps for low powers with circular
diffusers, very famous in parks or playgrounds, or starting
with sodium high pressure or low pressure, arriving to the
famous metal halide lamps, with powers up to 2000watts, the
poles used in any of the cases, start with 6 mts up to 12
mts, shapes of the fittings and diffusers, quite simple but
always looking for effectiveness.
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