Mercury vapor lights are cheap and give off a lot of light but a 100 watt high pressure sodium and 100 watt metal halide both give off more lumens than the mercury vapor light. Us the metal halide if you don't like the orange glow of high pressure sodium.
I was thinking one day a 100 watt HPS light 75.00 vs 175 MV 25.00 again both having about the same output. The cost to run the extra 75 watts for 10 hr a day at 10 cents a kilowatt hour is an extra 7.5 cents a day. Doesn't sound like much but it takes 667 days to make up the extra cost. These lights should run for 10 years with no problems so a 2 year payback and then 8 years of savings at 25.00 a year that adds up pretty well in my book.
I know my math is not perfect cause electric rates are slightly higher here and other places but it gives you an idea of the savings and think of the power company if 1000 customers saved 750 watts a day.
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Today's Featured Article - Search For Spares - by Anthony West (UK). Following on from the aquisition of the old Fordson F, I was very much in need of spares. As a novice though I didn't appreciate the fact that there were so many Fordson tractors made, that all the other makes seem rare by comparison. As far as I was aware a fordson was a fordson and it was only through trial an
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