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| Author | Message | 
| vidaliaman Member
 | # Posted: 1 Oct 2015 11:22am Reply
 
 i have a 12v battery that i use to clip a work light onto, i have a DC 12v 5w led light in it and it works great.  if i wire with 14/2 wire 8 light recepticals for a distance of 100ft of wire(pole building) what type and size of battery bank would i need to light all 8 lights at full brightness to work for a length of time of one hour?  and if possible the calculations to come up with the answer
 
 thanks dave
 
 
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| creeky Member
 | # Posted: 1 Oct 2015 01:33pm Reply
 
 5w x 8 = 40w.
 
 12v at 40 w = 3 amps
 
 3 amp line loss over 100 ft. with 14g. = not much.
 
 50w at 12v = 4 amps per hour.
 
 take the amp hr capacity of your battery. divide by 3 (depth of discharge). take that number and divide by 4 (amps consumed per hour). the result is your nominal hours of lights with all lights on full.
 
 any more questions. i'm here all week folks.
  
 
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| vidaliaman Member
 | # Posted: 1 Oct 2015 02:55pm Reply
 
 Nice!!! Will get working
 Thanks dave
 
 
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