For the price difference, you could easily justify upgrading to a 1 wire alternator and using cheaper fixtures. What amp rating is your alternator, and what is drawing from it right now?
Also, instead of going to a 1 wire alternator, most of these older 10si and similar common alternators can be bought with upgraded amperage from auto parts stores. I think the 10si was available from 35 to 65 amp, depending on application. Most of those are around $40.
That's what I did with my last combine when I went from 2 factory lights, to 7 higher wattage halogen lights. In this picture the lights are dim because I was fooling with the lights all day, battery was around 10 volts with the lights on.
each light is 55 watts, which, at 12 volts, draws just a shade over 4.5 amps each. 7x4.5=31.5 amps.
Since the combine was originally equipped with a 35 amp alternator, I installed a 60 amp alternator for $45. With no other real current drag on the system, I had a net gain in available amps more than the difference between stock and modified.
So, basically, if you know what you have(should be in the owners manual under specs) and you know what alternator type you have, it wouldn't be much to spend more on something that allows for future expansion in other areas as well, instead of having high priced fixtures.
Also, before I forget... The fixtures I installed on that combine were bought at Harbor Fright for $7.99 each including the bulbs. That was a dollar more than napa charged me just for the bulbs. I should have taken a picture of the grain head from inside the cab at night. I could see every gnat and mosquito in the field. lol
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Today's Featured Article - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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