There are some assumptions I will make for this calcualtion. One is that the battery is fully charged, and two, the temperature is not taken into account. Three, I think those bulbs draw about an amp each. Keeping those factors, consider a discharge rate of 2Ah. For a 650A battery we would be talking about 325 hours which is about 13 and a half days. Chris Middlebrook 62 Custom Southampton --- On Sun 04/11, Kerry Pinkerton < pinkertonk@xxxxxxxxx > wrote: From: Kerry Pinkerton [mailto: pinkertonk@xxxxxxxxx] To: mailing-list@xxxxxxxxxxxxxxxx Date: Sun, 11 Apr 2004 09:35:46 -0500 Subject: IML: ? for the Electrical Engineers Can one of you EEs tell me how long with a fully charged 650amp battery <br>light two tail light bulbs single filament, 12 V.<br><br>Thanks<br><br>Kerry<br>wheelingmachines.com<br>dte.net/57imperial<br>Attachment: pinkertonk.vcf (0.26KB)<br> _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web!