Thread: Blowing bulbs
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Old 02-16-2007, 10:06 AM
davidfarnham davidfarnham is offline
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Join Date: Dec 2006
USDA
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After reading about the voltage some of you guys say you are running on your bulbs, I have a comment & a question. I design my circuits for max voltage drop at eack bulb of 5%. In most of the areas I work, the voltage delivered by the power co. is 125 volts, therefore 12.5 volts on the output of a lighting transformer. Thus, my design voltage with voltage drop to each bulb is 11.88 volts (12.5-.05*12.5=11.88). That brings me to my question. How do you guys figure voltage drop? I have found that some of the factory rep's info on the web on low voltage lighting calculations gives results that are exactly half the voltage drop. That tells me that that they don't even understand basic circuits or Ohms Law.
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