30-6 Posted February 27, 2011 Report Share Posted February 27, 2011 A farmer has asked me to shoot some rats that are eating his barley grain which he uses to supplement cattle feed. It is stored in a building with a roof but one side is open, it has no mains electric. I've seen evidence of them, so they are there. I sat out as it got dark but they were not out and about then, so I am going to try and lamp them, I,ve got various lamps with dimmer switches which I've used on rats in the past sucessfully and a lidl night vision monocular. I want to try a static light with a bait station though rather than be "wired" to the battery and tangles. So if I rigged up a 21w orange indicator bulb to a 17A battery, how long would it last ? Quote Link to comment Share on other sites More sharing options...
HW682 Posted February 27, 2011 Report Share Posted February 27, 2011 (edited) With a 12v battery, 21W lamp will draw a current of 21W/12V = 1.75Amp Assuming you mean 17AH battery (amp.hours), in theory it will last 17AH/1.75A = 9.7Hours. This is approximate and will depend on the condition of the battery and exactly when you decide the lamp becomes too dim to be useful, but it gives you a rough idea. HTH HW682 Edited February 27, 2011 by HW682 Quote Link to comment Share on other sites More sharing options...
30-6 Posted February 27, 2011 Author Report Share Posted February 27, 2011 Cheers for the reply, that,s plenty of time, fall asleep otherwise Quote Link to comment Share on other sites More sharing options...
The Duncan Posted February 28, 2011 Report Share Posted February 28, 2011 You or the rats? Quote Link to comment Share on other sites More sharing options...
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